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随时随地学习
随时随地学习
1、After years of learning Chinese, I still can’t understand everything , particularly in the rural areas. These are my most ______moment---when I can’t understand what people say.
A. sceptical B. awesome C. optional D. Awkward
2、We have different language courses; you can choose ________ if you like.
A. one B. it C. each D. either
3、A Wechat (微信) is an invention______ can help people talk to friends, share photos, ideas and feeling freely.
A.which B.what C.whose D.it
4、It's ________ knowledge that moods can have an influence on our health.
A．unusual
B．special
C．general
D．common
5、You probably have noticed that people express similar ideas in different ways, _______ the situation they are in.
A. bringing about B. depending on
C. getting into D. leading to
6、_____ with so much trouble，we failed to complete the task on time．
A．Faced B．Face
C．Facing D．To face
7、The new policy allows a couple to have a second birth____either is an only child.
A. if only B. on condition that
C. unless D. until
8、You have to explain ________ you were absent from school yesterday.
A. what B. which C. where D. why
9、A warm thought came to me ____ I might help wash my mom’s feet on Thanksgiving Day.
A．if
B．when
C．which
D．that
10、— What do you want to do next? We have half an hour until the basketball game.
— ______. Whatever you want to do is fine with me.
A.It just depends B. It’s up to you
C. All right D. Glad to hear that.
11、_____ by the latest electronic toys, the little boy stood in front of the windows, without moving．
A．To be arrested B．Arrested
C．Having arrested D．Arresting
12、 we have accomplished our mission, we hope the situation will return to normalcy.
A. As soon as B. Because
C. Though D. Once
13、Hard work and lack of sleep have _____ her beauty and youth in recent years.
A. worn out B. tried out
C. made out D. sent out
14、He _______after a few day’s treatment in hospital．
A．picked up B．made up C．took up D．looked up
15、When you are faced with challenges, try not to let discouraging thoughts _____. Be confident and trust yourself, and you’ll make it.
A．take on
B．take up
C．take in
D．take over
16、Recently a terrible fire broke out in the America, _______ the people are still suffering.
A.whose effects B.which affects
C.of its effects D.from whose effects
17、－Personally，I believe I can do it well on my own．
－________Selfconfidence is the first secret of success．
A．It's up to you． B．Take it easy．
C．Let' s get going． D．I'm with you on that．
18、—Will you attend the meeting this afternoon？
—But I ________ told anything about it．
A．haven't been B．am not
C．wasn't D．won’t be
19、It may take a few weeks for your application to be ____.
A. possessed B. processed
C. produced D. persuaded
20、With help from all parts of the country, the people in the flooded area managed to _______ that harsh winter.
A．get through B．look through
C．come up D．get out
21、 A new study showed evidence of how coal burning which was caused by a volcanic eruption resulted in climate change in Siberia. It discovered the first direct evidence of how extensive burning of coal in Siberia caused the Permian-Triassic（二叠纪至三叠纪）Mass Extinction Event. Their study was published recently in Geology. The research team looked at the volcaniclastic rocks found in the Siberian Traps. These eruptions lasted for about two million years more. The mass extinction almost extinguished life on our planet around 252 million years in the past.
Researchers calculated the temperature of marine waters at the time extinctions were at their peak, and results showed that the planet was in an extremely high temperature level, with ocean and sea temperatures around the equator（赤道）over 104° F. Ecosystems and plant and animal species needed millions of years to establish a new balance and recover populations.
One assuming cause of the event involves massive coal burning, which led to extreme global warming and extinguished most life forms. The team set out to look for evidence of this theory and began to study the region of the Siberian Traps, where magma and lava （岩浆和熔岩）are known to have burned coal and wood.
In the Angara River, the team found high cliffs of volcaniclastic rocks that line the river for many hundreds of miles. They studied the structures for six years, travelling far and wide to collect rocks. More than a thousand pounds of rock samples were collected and shared with a scientific team.
Upon analysis, they found strange parts that seemed to be burnt wood and coal.
Co-author Steve Grasby from the Geological Survey of Canada had previously found similar tiny burnt coal material on an arctic island in Canada, which also dated from the end of the Permian Period and were believed to have floated into the area from Siberia.
Similar events also occur today, with human burning of coal and other fossil energies. The team leader Elkins — Tanton says this is an extra incentive （动 因）for us to act now. Indeed? taking action may prevent or at least slow another mass extinction event.
【1】What does the underlined word "extinguished” in the first paragraph mean?
A.Destroyed. B.Constructed.
C.Formed, D.Strengthened.
【2】What was the major cause for the life to die out on the earth?
A.Parts from the volcanic eruption.
B.Lack of food after the volcanic eruption.
C.High temperatures caused by the volcano.
D.Magma and lava of the volcanic eruption.
【3】What does Elkins — Tanton expect us to do?
A.To avoid burning the fossil fuels.
B.To try to prevent volcanoes erupting.
C.To take measures to protect wild animals.
D.To learn how to stay alive in disasters.
【4】What is this text mainly about?
A.How to protect our earth more effectively.
B.The mass extinction in history in Siberia,
C.The high temperatures around the world.
D.A study of coal burning in history in Siberia.
22、Today I had to go to work with my crutches (拐杖). I was worried about using my crutches. People would think I was looking for attention, judge me because I was overweight or think I didn’t need then. I kept asking my husband, “Is this odd?” He replied, “I don’t know what kind of pain you’re in.” I accepted that. He didn’t know. I couldn’t assume anything. I had to do what was best for me.
Six months ago, I was in the emergency room twice for unbearable pain in my hips (臀部) and down my left leg. I couldn’t stand, walk or sit. The doctors declared it sciatica (坐骨神经痛) and ordered physical treatment, which did help.
But since the sciatic attack, I have been suffering from pain. I had to stay at home from work because I could barely get out of bed. I was not sure what was going on, but I knew that there were days when I needed help.
I used crutches because my hips ached with every move. The doctor agreed the crutches would keep me upright and would help me keep moving when I didn’t want to or couldn’t move.
On weekdays, I had to stand for hours sometimes, I spent the weekends packing boxes and carrying things down stairs because we were moving to another apartment. We didn’t get everything packed in time for the move, so now we had to finish up.
I overworked my body, so my crutches came with me to work today. Some people remembered my first sciatic attack and offered to help with stuff. Others forgot and were shocked that just yesterday, I wasn’t using crutches, but today I was. My boss assigned me tasks that I couldn’t do today, but my student assistant offered to help. At lunch, when I lay on the floor of my office and took a rest, no one laughed at me.
Tonight I have to do more packing and more loading. I’m grateful for my crutches. I can have an easy laugh and make jokes about the pain—oh, you know that sciatica, undiagnosed repeated pain!
【1】Why did the author keep asking-her husband a question?
A．To emphasize the pain she suffered.
B．To test her husband’s love and care.
C．To present different opinions on crutches.
D．To get rid of her concern about using crutches.
【2】What does the author actually want to say by writing Paragraphs 3-5?
A．She led a painful but happy life.
B．She wanted to give up her current job.
C．She needed to see a doctor on a regular basis.
D．She felt it necessary to go to work with her crutches.
【3】How was the author at work today?
A．She was in poor condition.
B．She went well with her work.
C．She felt embarrassed and helpless.
D．She was laughed at by others.
【4】What is the text mainly about?
A．My crutch story.
B．A battle against overweight.
C．A journey to walking freely.
D．My assumptions on crutches.
23、Advanced technology brings with it a lot of benefits to us. You can now prevent the speech of a single target person from being recorded by using a device called voice jammer.
Voice jammers work much like noise-canceling headphones, which effectively remove unwanted background sound waves out of existence by playing back a copy of the unwanted sound with its wave pattern inverted (反向的).
Such voice jammers generally stop electronic eavesdropping (窃听) on conversations by broadcasting inverse sound waves that affect all microphones within earshot.
This can prevent nearby people’s phones from picking up their voices if they try to make a call, and can stop them interacting with smart assistants, warning that something strange is going on.
Now Qiben Yan at Michigan State University and his colleagues have created a voice jammer that can target a specific voice without causing interruption to anyone else. They did this by training an artificial intelligence called a neural network to isolate (隔断) a speaker’s voice, allowing the jammer to create an inverse sound matched to their speech.
Rather than sending an audible sound, their tool, called Neural Enhanced Cancellation (NEC), makes use of a bug found in all but the most expensive microphones. This bug introduces sounds at set distances above and below the microphone’s recording frequencies. NEC is able to play its inverse speech in the ultrasonic (超声波) range, so that humans can’t hear it. Doing this at the point of recording provides the necessary frequencies to secretly block an audible voice.
The team found that NEC blocked voices on a range of smartphones from Apple, Xiaomi and Samsung at a distance of up to 3.6 metres. And this technology could be useful.
【1】How do voice jammers prevent a speech from being recorded?
A．By playing inverse sound waves.
B．By interacting with smart assistants.
C．By keeping wave pattern unchanged.
D．By broadcasting different sound waves.
【2】What does Paragraph 6 focus on?
A．Stressing the importance of NEC.
B．Showing the steps of using NEC.
C．Describing the disadvantages of NEC.
D．Explaining the working theory of NEC.
【3】What does the passage mainly talk about?
A．The NEC blocking voices.
B．A device against eavesdropping.
C．A bug playing inverse sound waves.
D．The technology changing the speech.
【4】What might be discussed in the following paragraph?
A．Disadvantages of voice jammers.
B．Public opinions on voice jammers.
C．Further development of voice jammers.
D．Potential applications of voice jammers.
24、 Why would human beings waste a third of their lives sleeping when they could be doing more important things like looking after their families or working? Some scientists believe sleeping helps recharge the body, while others think it is important for strengthening newly-formed memories. Now, there is new evidence which suggests that the purpose of sleep may be to forget some of the millions of new things we learn each day.
The neurons (神经元) in the human brain consist of fibers called dendrites (树突). These grow as we learn new things and connect the brain's cells to each other at contact points called synapses (突触). The larger the dendrites become and the more cells they connect, the more information we store.
In 2003, Giulio Tononi and Chiara Cirelli, both biologists at the University of Wisconsin-Madison, suggested a new idea: The things our brains learn each day result in so many synapses that things start to get a little messy. Sleeping allows us to sort through the "noise" and dispense all the unnecessary information, leaving behind only the most important memories-
Recently, the university's research has provided direct evidence to support the theory. The experiment involved analyzing 6,920 synapses in the brain shavings from two groups of mice over a four — year period; one group had been allowed to sleep, while the other had been kept awake and entertained with toys. The researchers discovered that the brain shavings of the sleeping mice had nearly 20 percent fewer synapses than those that had been kept awake and entertained.
It was also evident during the study that the brain does not shave every synapse. 20% of neurons remained unchanged; these were most likely well-established memories. Therefore, although we may be sleeping to forget some of what we've learned, the brain "forgets" in a smart way.
Most researchers believe clearing our brains is not the only purpose of sleep. Resting our minds and bodies has also been found to help with other biological functions like strengthening our immunity. Though scientists may never agree on a single reason, they are all sure of one thing — a good night's rest is essential for our health. So try and spend at least a third of your day sleeping!
【1】What will happen when we learn new things?
A.We tend to forget some key information.
B.We develop the ability to recharge the body.
C.The dendrites expand and connect brain's cells.
D.The neurons gather at what are called contact points.
【2】Which of the following can replace the underlined word “dispense” in Paragraph 3?
A.Pick up. B.Get rid of.
C.Bring down. D.Pull out of.
【3】What is the author's purpose of writing the text?
A.To prove a new theory.
B.To report a new discovery.
C.To show sleep good for memory.
D.To discuss how long one should sleep.
25、My most memorable experience was when my father and I got lost in a forest. We were camping in Sequoia National Park for a long weekend. As____as we got there, my family and I ____our tents and by then it was starting to get____
My dad started up a small fire and____that there would not be enough wood for the____, so he decided to go for some firewood. I wouldn’t let my father go off____his own, so I followed in his direction. I____up with him and we went off into the forest____for some firewood.
Soon we got off track and realized we got_____ With nothing but a flashlight(手电筒), we started____ back. We felt like foreigners, not familiar at all with the____ My dad stopped to figure out (琢磨) what____we could do, ____I just sat down on a fallen tree. After a couple of minutes of rest, I thought it would be OK to____
All of a____ I felt my dad’s arm____me up and he placed my head on his____ I felt as safe as a bear, protecting over its child. My dad walked and walked____he found a trail(小路), and one way or another he found our campsite. My mother was very____, almost crying about where we were. ____, I think that it was a good thing to be lost for a little while because I got to spend good quality time with my dad.
【1】
A．long
B．soon
C．far
D．well
【2】
A．put up
B．picked up
C．took up
D．gave up
【3】
A．black
B．clean
C．clear
D．dark
【4】
A．realized
B．promised
C．recognized
D．admitted
【5】
A．day
B．afternoon
C．night
D．morning
【6】
A．on
B．with
C．by
D．at
【7】
A．came
B．caught
C．put
D．got
【8】
A．asking
B．calling
C．looking
D．sending
【9】
A．paid
B．lost
C．dressed
D．changed
【10】
A．returning
B．looking
C．walking
D．arriving
【11】
A．environment
B．language
C．difference
D．expression
【12】
A．exactly
B．frequently
C．entirely
D．gradually
【13】
A．but
B．yet
C．so
D．because
【14】
A．play
B．walk
C．sleep
D．seat
【15】
A．moment
B．minute
C．flash
D．sudden
【16】
A．throw
B．set
C．draw
D．pick
【17】
A．head
B．leg
C．shoulder
D．arm
【18】
A．unless
B．until
C．while
D．since
【19】
A．worried
B．excited
C．calm
D．eager
【20】
A．Therefore
B．Otherwise
C．Besides
D．However
26、近日你所在的学校开展了“为建设节约型社会献一计”主题活动，同学们提出了许多建议。请你根据以下要点，用英语写一篇短文向English Horizons杂志编辑部投稿：
有人建议
1.不浪费粮食和纸张 2.尽量不使用方便筷、塑料袋3.毕业生将书赠给低年级同学循环使用？
注意：1.不要逐字翻译，可适当增加细节；2.词数：120字左右，开头已经为你写好，不计入总词数；3.参考词汇：方便筷disposable chopsticks
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