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随时随地学习
随时随地学习
1、Though having lived abroad for years, many Chinese still ________ the traditional customs.
A．settle
B．postpone
C．observe
D．support
2、He_____________as he thought of his failure to sell his newspapers.
A.broke down B.broke off C.broke up D.broke out
3、During the weekend, the health club is usually full of people to get in shape
A． try B．grew
C． trying D． having tried
4、 The problem should be handled very carefully to balance the needs of people with __________ of nature．
A. ones B. this C. those D. that
5、Oh！I can feel something _____ up my leg！It must be an insect．
A．to climb B．climbing
C．climb D．climbed
6、He found it difficult to read, ________ he had a problem with his eyesight.
A. but B. for C. or D. so
7、At the beginning of a speech, it is very important to grab the audience’s attention and make them interested in ______ you have to say.
A. which B. what C. that D. who
8、My printer is five years old, so I'd like to ______ it and purchase a new one online.
A.delete B.retire C.refresh D.declare
9、Words failed me when I heard the news of the New Year’s Eve stampede in Shanghai. But for lacking a sense of safety, so many people __________ killed or injured．
A. couldn’t be B. wouldn’t have been
C. mustn’t have been D. shouldn’t be
10、In spite of his ________ to be a scholar in that field, he is not well equipped with that talent.
A. potential B. competence
C. ambition D. character
11、 — It’ll take at least two hours to do this!
— Oh, _______! I could do it in 20 minutes.
A. hi, there B. cheer up
C. come on D. hard to say
12、Thousands of people will gather in the square, waiting for the clock to 12 announcing the arrival of New year.
A．strike
B．beat
C．hit
D．knock
13、I really don’t know _________ she gets by on such a modest salary.
A. what B. why
C. how D. that
14、This company was ______ of using misleading advertisements in its promotion of the weight-loss pills
A. charged B. accused C. blamed D. approved
15、He spoke through a microphone, ________ he was clearly heard in the great hall.
A.even if B.once C.in order D.so that
16、--- Why do you think he is feeling spiritless?
--- Because staying up late makes him at his worst ___________ physical situation．
A．in terms of B．in addition to C．on account of D．regardless of
17、The room is three meters long and two meters ________.
A. broad B. board
C. abroad D. width
18、_______ human beings use it in a wrong way, like we did with nuclear technology, the advancement of science and technology has never led to decline of human development.
A. While B. Unless
C. As long as D. Before
19、—When are you leaving?
—My plane _________ at six.
A. took off B. is about to take off
C. takes off D. will take off
20、We cannot the punctual arrival of trains in foggy weather
A.get B.help C.guarantee D.guess
21、Directions: Complete the following passage by using the sentences given below. Each sentence can be used only once. Note that there are two more sentences than you need.
We Americans ingest an average of 25 pounds of rice a year-and a portion of that comes from drinking beer. Yes, rice is a sample in our diet. But is it a safe one? Consumer Reports recently found "troubling" levels of inorganic arsenic, a known human carcinogen (a substance which can cause cancer), in almost every rice-containing food it tested. 【1】 But rice takes up arsenic from soil and water more readily than other grains do.
Health-conscious consumers rely on brown rice, which has even more arsenic. In the Consumer Reports test, a quarter cup of uncooked white rice had from roughly 1 to 7 micrograms of inorganic arsenic, while brown rice had from 4 to 10 micrograms. Why the difference? 【2】.
What about rice cakes? They contained from 2 to 8 micrograms per serving, while hot and ready-to-eat rice cereals had 2 to 7 micrograms. These levels are at least five times higher than those found in other cereals, such as oatmeal.
Studies show that people exposed to large amounts of arsenic for many years are more likely to die of cancer. In Bangladesh, people who drank tap water that contained 50 to 149 micrograms of arsenic per liter for 20 or 30 years, for example, were 44 percent more likely to die of cancer. 【3】 (The U.S. Environmental Protection Agency limits the total amount of arsenic in drinking water to 10 micrograms per liter.) But our total risk is unclear. There isn’t enough data to set a limit on inorganic arsenic in food, says the Institute of Medicine of the National Academy of Sciences.
The Bottom Line: 【4】 Consumer Reports recommends that adults eat no more than 11 /2 to 2 cups of cooked (brown or white) rice a week. And here is a way to lessen risk: Rinse your rice, cook it in six parts water to one part rice until it reaches eating texture, and then pour off the extra water. This can remove about half the arsenic.
A.You might wonder what one conscious portion of rice could do for your whole body.
B.Americans are lucky to be exposed to lower levels of arsenic.
C.This poisonous element is in a wide range of food-including fruits, vegetables and grains.
D.Until more studies are done, curb your consumption of arsenic.
E.Brown rice appears to be the most effective whole grain for the healthy growth of human beings, but its darker color can easily absorb too much arsenic.
F.Brown rice tends to have more arsenic because the metal concentrates in the outer layers, which are burnished off in white rice.
22、Wireless sensors have many applications, but using sensors across a large area can be time-consuming and expensive.
Inspired by dandelions(蒲公英), a University of Washington team has developed a tiny sensor-carrying device that can be blown by the wind. This system is about 30 times as heavy as a dandelion seed but can still travel up to 100 meters in the light wind from where it was released by a drone(无人机). Once on the ground, the device, which can hold at least four sensors, uses solar panels to power its onboard electronics and can share sensor data up to 60 meters away.
The team published these results on March 16 in Nature.
“The way dandelion seed structures work is that they have a central point and these little bristles(刺毛)sticking out to slow down their fall. We took a 2-D projection of that to create the base design for our structures, ” said lead author Vikram Iyer. “As we added weight, our bristles started to bend inwards. We added an outer ring to increase the structure’s inflexibility, resulting in something that looks a bit like a 2-D wheel. “
To keep things light, the team used solar panels. The devices landed with the solar panels facing upright 95% of the time. Their shape and structure allow them to fall like a dandelion seed.
Without a battery, however, the sensors stop working after the sun goes down and need energy to get started in the morning. The team designed the electronics to include a capacitor that can store some charge overnight.
Since the devices are going to be spread, there’s a risk of them being mistaken for actual seeds by animals. There’s also another issue. Right now, these sensors aren’t designed to break down. Even though they’re tiny, long-term use of enough of them would create litter.
While these tiny, solar-powered, dandelion seed-like sensors still have to undergo some testing and improvement, they represent a new way to gather environmental data.
【1】What do we know about the device?
A．It consists of four sensors.
B．It is powered by solar panels.
C．It weighs about as much as a seed.
D．It can be carried as far as 60 meters by the wind.
【2】What did the team do to make the device difficult to bend?
A．They improved its weight.
B．They gave it a central point.
C．They added a lot of bristles to it.
D．They designed a ring structure for it.
【3】Which of the following is one challenge facing the device?
A．It can’t share sensor data accurately.
B．It can’t land with its solar panels facing upright.
C．It may bring harm to wildlife and the environment.
D．It may stop its capacitor from working during the night.
【4】What is the best title for the text?
A．Sensor-carrying devices benefit dandelions
B．Battery-free tiny capacitors work in a device
C．Dandelion-inspired sensors float in the wind
D．Dandelion-like sensors transform dandelion seeds
23、Harvard Pre-College Program
SESSION I: | SESSION II: | SESSION III: |
June 23 --- July 5, 2019 | July 7 --- July 19, 2019 | July 21 --- August 2, 2019 |
Our summer program for high school students is designed to pave the way for a successful college experience.
HERE YOU CAN:
Learn without limits
Pursue your interests in courses focusing on physics, law, writing, philosophy, and a dozen other subjects.
Live at Harvard
* You will live in a historic undergraduate house near Harvard Square.
* Your plan covers three meals a day, seven days a week.
Have fun outside the classroom
You might enjoy a Cirque du Sileil performance, a Red Sox game at Fenway Park, or a trip to the Museum of Science.
ELIGIBILITY (申请资格)
Students are academically motivated and will graduate in 2020 or 2021.
TO APPLY
Complete an online application and provide the following materials: the $50 nonrefundable application fee; transcripts (成绩单) with fall 2018 grades; signed rules and regulations.
INTERNATIONAL STUDENTS
Participants should apply for the B-2 tourist visa. If English is not your native language, submit scores from the TOEFLor IELTS language proficiency exam.
APPLICATION TIPS
* No fee is required to start your application. You will be asked to pay the application fee only upon submitting the application.
* The scores of successful applicants are typically above 103 on the TOEFL with 25 on the written section or at least 7.5 on the IELTS with 7 on the written section.
* Use a desktop or laptop. You will be asked to write short essays as part of your application. This may be challenging to do on a mobile phone.
* You will receive an email informing you of the application status approximately three weeks after you have completed your application.
【1】Harvard organizes such a program to ______.
A.reduce students’ academic pressure
B.select good students to join in Harvard
C.make students obtain high grades in their study
D.help students prepare for their future college life
【2】What can we learn about the program?
A.Students are offered three meals except weekends.
B.It merely has two sessions during one summer.
C.It provides courses on various subjects for students.
D.Students can live in a hotel near Harvard.
【3】If you are a native student who wants to apply for the program, you need to provide ______
A.a B-2 tourist visa
B.transcripts with your fall 2018 grades
C.scores from the TOEFL exam
D.a recommendation letter from your high school teacher
【4】The applicants can learn from the application tips that ______.
A.their TOEFL or IELTS scores should meet the requirements
B.the application fee should be paid before they start applying
C.it is convenient to use any electronic products to apply
D.they can check the application status in a week
24、 More than a billion people around the world have smart phones, almost all of which come with navigation (导航) apps such as Google or Apple Maps. This raises the questions we meet with any technology: what skills are we losing? What abilities are we gaining?
Talking with people who’re good at finding their way around or using paper maps, I often hear lots of frustration with digital maps. North/South direction gets messed up, and you can see only a small sections at a time.
But consider what digital navigation aids have meant for someone like me. Despite being a frequent traveler, I’m so terrible at finding my way that I still use Google Maps every day in the small town where I have lived for many years. What looks like an imperfect product to some has been a significant expansion of my own abilities.
Part of the problem is that reading paper maps requires specific skills. There is nothing natural about them. In many developed nations, including the U.S., one expects street names and house numbers to be meaningful references, and instructions such as “go north for three blocks and then west ” make sense. In Istanbul, in contrast, where I grew up, none of those hold true. For one thing, the locals rarely use street names. Why bother when a government or a military group might change them again? Besides, the city is full of winding, ancient alleys that meet newer avenues at many angles. Instructions as simple as “go north”would require a helicopter or a bulldozer.
Let’s come back to my original questions. While we often lose some skills after leaving the work to technology, it may also allow us to expand our abilities. Consider the calculator: I don’t doubt our arithmetic skills might have dropped a bit as the little machines became common, but calculations that once boring and tricky are now much more straightforward and one can certainly do more complex calculations more confidently.
【1】What does the underlined word “frustration” in paragraph 2 mean?
A.Convenience. B.Annoyance. C.Excitement. D.Explanation.
【2】What does digital map mean to the writer?
A.Travelling friend. B.An imperfect product.
C.A good helper. D.A learning tool.
【3】What can we learn from the fourth paragraph?
A.The skills of reading maps are important.
B.How Americans name street.
C.America and Istanbul are different in many ways.
D.It is necessary to use navigation maps in Istanbul.
【4】Which of the following will the writer agree?
A.Two paper maps are better than a digital one.
B.Calculations become boring due to the use of calculators.
C.Technology reduces our abilities.
D.When technology closes a door, it opens one as well.
25、“You are unemployable,”the young woman said. She rose,_______my interview. Getting shakily to my feet, I lowered my head to hide hot tears_______to come out. I said “Thanks”, turned, and___________out of the employment agency.
Climbing into my car, I let the_______flow. At forty-four years old, unexpectedly alone with teenage children and myself to_______, I had four months of job_______behind me. At first, I was not_______because I felt sure that I could be of use somewhere.But in more than thirty_______, I had been told I was unqualified.
_______to go home, I drove down Main Street and parked in the only shady space. I saw that I was in front of an old building and a________over a small door read“Temporary Services.”I left the car and walked toward the sign.________a faded arrow,I stepped inside and climbed the stairs. I walked into a plain office and a woman________me,“My name is Mary. How can I help you?"I told Mary my________and Mary listened quietly. Minutes passed. She looked me in the eyes and said,“My dear, there is a place for you, and we'll________it."
Nearly a week later,my telephone________and Mary told me a small company needed me for two weeks. The pay for two weeks would be________, but it was a beginning. After Mary rang off , I____________the week. Coincidence? I think not. In near________, I had climbed those worn stairs and found a warm-hearted woman. A________was made and kept, so began the first step in a________direction , which led to a bright future.
【1】
A．attending
B．ending
C．remembering
D．changing
【2】
A．agreeing
B．pretending
C．threatening
D．refusing
【3】
A．stuck
B．fell
C．rose
D．hurried
【4】
A．sweat
B．tears
C．words
D．oil
【5】
A．entertain
B．praise
C．respect
D．support
【6】
A．hunting
B．description
C．training
D．history
【7】
A．patient
B．tired
C．worried
D．polite
【8】
A．performances
B．interviews
C．reports
D．arguments
【9】
A．Available
B．Proud
C．Ready
D．Unwilling
【10】
A．clock
B．present
C．sign
D．flag
【11】
A．Carrying
B．Missing
C．Watching
D．Following
【12】
A．hired
B．greeted
C．introduced
D．encouraged
【13】
A．holiday
B．origin
C．story
D．character
【14】
A．read
B．find
C．keep
D．collect
【15】
A．broke
B．updated
C．arrived
D．rang
【16】
A．low
B．fair
C．common
D．due
【17】
A．left behind
B．looked forward to
C．thought back to
D．relied on
【18】
A．balance
B．desperation
C．starvation
D．future
【19】
A．secret
B．network
C．promise
D．mistake
【20】
A．positive
B．familiar
C．similar
D．random
26、阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。
There are a number of volunteer organizations out there that deal in things like clothing donation and the sale of used books. Retired schoolteacher Cathy has been a member of such an organization, VNSA, since 2012. Her duties involve working throughout the year to help prepare the books for their February sale and acting as personnel manager for the sale. That means she helps coordinate (协调) all the other volunteers who help out before, during, and after the event.
It was before the 2019 book sale and Cathy once again found herself sitting among a towering pile of books and sorting through them to ensure that they would be in good enough condition to resell. As she was sorting, she came upon a book, wrinkled and broken. Though she didn’t like doing it, the only remaining choice for her was to throw it away.
A greedy book lover herself, Cathy felt guilty about throwing away any book. Before she threw it away, she decided to check for more serious damage inside that might justify her giving it up. She opened the cover and went through the pages when she noticed something unusual.
Going through the pages, Cathy was surprised to see that a part had been hollowed out (挖空)inside the book. Obviously, something was hidden in that rather expertly hollowed space. She looked down and saw that the book’s previous owner had hidden four packages in the space, each containing ten $100 bills. Cathy’s first thought was that the bills were toy money that perhaps a kid had hidden inside as part of some childish game or something.
注意:
1.续写词数应为150左右；
2.请在答题卡的相应位置作答。
But Cathy soon realized that these were real $100 bills.
_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Luckily for Cathy, the book also contained the name of the book owner.
_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
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