We’re trying to ring you back, Bryan, but we think we ________ your number incorrectly.


  1. A.
    looked up
  2. B.
    took down
  3. C.
    worked out
  4. D.
    brought about
B
本題考查短語動(dòng)詞的區(qū)別。look up“查閱”;work out“制定;算出”;bring about“帶來;產(chǎn)生”;而take down是“寫下;記下”之意。
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These could look much like the concept skycar shown in the picture, designed by Boeing research and development. However, such vehicles could be some 25 years from appearing on the market. Efforts to build flying vehicles in the past have not been very successful. Such vehicles would not only be expensive and require the skills of a trained pilot to fly, but there are significant engineering challenges involved in developing them. “When you try to combine them you get the worst of both worlds: a very heavy, slow, expensive vehicle that’s hard to use,” said Mark Moore, head of the personal air vehicle(PAV) division of the vehicle systems program at Nasa’s Langley Research Center in Hampton, US. But Boeing is also considering how to police the airways-and prevent total pandemonium(吵雜狂亂的喧鬧)-if thousands of flying cars enter the skies.

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The underlined word “envision” in Paragraph 1 most probably means “     ”.

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Now Nasa researchers’ aim is to      .

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The term “multitasking” originally referred to a computer's ability to carry out several tasks at one time. For many people, multitasking has become a way of life and even a key to success. In fact, some excellent mental aerobic exercises (大腦訓(xùn)練) involve engaging the brain in two or more challenging activities at a time. Although checking e-mail while talking on a phone and reading the newspaper may be second nature for some people, many times multitasking can make us less productive, rather than more. And studies show that too much multitasking can lead to increased stress, anxiety and memory loss.
In order to multitask, the brain uses an area known as the prefrontal cortex (前額葉腦皮層). Brain scans of volunteers performing multiple tasks together show that as they shift from task to task, this front part of the brain actually takes a moment of rest between tasks. You may have experienced a prefrontal cortex “moment of rest” yourself if you've ever dialed (撥電話) a phone number and suddenly forgotten who you called when the line is answered. What probably occurred is that between the dialing and the answering, your mind shifted to another thought or task, and then took that “moment” to come back. Research has also shown that for many volunteers, job efficiency (效率) declines while multitasking, as compared to when they perform only one task at a time.
Multitasking is easiest when at least one of the tasks is habitual, or requires little thought. Most people don' t find it difficult to eat and read the newspaper at the same time. However, when two or more attention-requiring tasks are attempted at one time, people sometimes make mistakes.
We often don't remember things as well when we're trying to manage several details at the same time. Without mental focus, we may not pay enough attention to new information coming in, so it never makes it into our memory stores. That is one of the main reasons we forget people's names—even sometimes right after they have introduced themselves. Multitasking can also affect our relationships. If someone checks their e-mail while on the phone with a friend, they may come off as absent-minded or disinterested. It can also cause that person to miss or overlook key information being passed on to them.
1. Why are some mental aerobic exercises designed to engage people in multitasking?
A. To make them more productive.                
B. To reduce their stress and anxiety.
C. To develop their communication Skills.         
D. To help them perform daily tasks more easily.
2. According to Paragraph 2, why may a person suddenly forget who he has called?
A. He may have his prefrontal cortex temporarily damaged.    
B. He is probably interrupted by another task.
C. He is probably not very familiar with the person he has called.    
D. He may need a rest between dialing and speaking.
3. People tend to make mistakes when       .
A. they perform several challenging tasks at a time 
B. new messages are processed one after another    
C. their relationships with others are affected       
D. the tasks require little thought
4. What is the main idea of the passage?
A. Multitasking has become a way of life.
B. Multitasking often leads to efficiency decline.
C. Multitasking exercises need to be improved.
D. Multitasking enables people to remember things better.

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As motorways become more and more blocked up with traffic, a new generation on flying cars will be needed to ferry people along skyways. That is the conclusion of engineers from the US space agency and aeronautical firms, who envision future commuters traveling by “skycar”.
These could look much like the concept skycar shown in the picture, designed by Boeing research and development. However, such vehicles could be some 25 years from appearing on the market. Efforts to build flying vehicles in the past have not been very successful. Such vehicles would not only be expensive and require the skills of a trained pilot to fly, but there are significant engineering challenges involved in developing them. “When you try to combine them you get the worst of both worlds: a very heavy, slow, expensive vehicle that’s hard to use,” said Mark Moore, head of the personal air vehicle(PAV) division of the vehicle systems program at Nasa’s Langley Research Center in Hampton, US. But Boeing is also considering how to police the airways-and prevent total pandemonium(吵雜狂亂的喧鬧)-if thousands of flying cars enter the skies.
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【小題1】The best title for this text would be      .

A.Developing SkycarsB.The Traffic Jams in the Sky
C.How to Guide Flying Cars in the SkyD.What Flying Cars Will Look Like
【小題2】 The underlined word “envision” in Paragraph 1 most probably means “    ”.
A.seeB.expectC.thinkD.a(chǎn)nnounce
【小題3】When engineers develop the skycars, they have to deal with the following difficulties except      .
A.how to fly out of regional airports
B.how to prevent the disorder of the airways
C.how to reduce expenses and the vehicle’s weight
D.how to fly the skycars to enter skies
【小題4】 Now Nasa researchers’ aim is to      .
A.make big flying cars
B.work out the plan——how to transform small plane travel
C.develop a new kind of small plane different from the traditional one
D.build a new kind of small plane with road-driving abilities

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