题目内容

5．Do you know that          with wise men improves your mind？（　　）
A．chatB．ChatsC．chattedD．chatting

分析 你知道与有智慧的人聊天会提高你的智力吗？

解答 答案是D．本题考查动名词做主语．题干含that引导的宾语从句，宾语从句中谓语动词improve前的"chat with wise man"充当主语；A和B都是谓语动词形式，不能做主语；C项无论是过去式还是过去分词都不能做主语，所以排除A、B和C；本题用动名词chatting做主语，所以答案选择D．

点评 对于非谓语动词的选择，首先要根据句子的结构判断句中缺少的是谓语动词还是非谓语动词；如果是非谓语动词，在理解非谓语动词的基本用法的基础上再根据句子的结构做出判断．

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15．A recent study of ancient and modem elephants has come up with the unexpected conclusion that the African elephant is divided into two distinct（不同 的）species．
     The discovery was made by researchers at York and Harvard Universities when they were examining the genetic relationship between the ancient woolly mammoth and mastodon to modem elephants-the Asian elephant，African forest elephant，and African savanna elephant．
     Once they obtained DNA sequences（序列）from two fossils（化石），mammoths and mastodons，the team compared than with DNA from modem elephants．They found to their amazement that modem forest and savanna elephants are as distinct from each other as Asian elephants and mammoths．
     The scientists used detailed genetic analysis to prove that the African savanna elephant and the African forest elephant have been distinct species for several million years．The divergence of the two species took place around the time of the divergence of Asian elephants and woolly mammoths．This result amazed all the scientists．
    There has long been debate in the scientific community that the two might be separate species，but this is the most convincing scientific evidence so far that they are indeed different species．
    Previously，many naturalists believed that African savanna elephants and African forest elephants were two populations of the same species，despite the elephants'significant size differences．The savanna elephant has an average shoulder height of 3.5 metres while the forest elephant has an average shoulder height of 2.5 metres．The savanna elephant weighs between six and seven tons，roughly double the weight of the forest elephant．But the fact that they look so different does not necessarily mean they are different species．However the proof lay in the analysis of the DNA．
     Alfred Roca，assistant professor in the Department of Animal Sciences at the University of Illinois，said，"We now have to treat the forest and savanna elephants as two different units for conservation purposes．Since 1950，all African elephants have been conserved as one species．Now that we know the forest and savanna elephants are two very distinctive animals，the forest elephant should become a bigger priority（优先）for conservation purposes．"
46．One of the fossils studied by the researchers is that ofD．
A．the Asian elephant                       B．the forest elephant
C．the savanna elephant                     D．the mastodon elephant．
47．The underlined word"divergence"in Paragraph 4 means"C．"
A．evolution      B．exhibition             C．separation       D．examination
48．The researchers'conclusion was based on a study of the African elephantsA
A．DNA        B．height                 C．weight          D．population
49．What are Alfred Roca's words mainly about？A
A．The conservation of African elephants．
B．The purpose of studying African elephants．
C．The way to divide African elephants into two units．
D．The reason for the distinction of African elephants．
50．Which of the following can be the best title for the passage？C
A．Naturalists'Beliefs about Elephants
B．Amazing Experiments about Elephants
C．An Unexpected Finding about Elephants
D．A Long Scientific Debate about Elephants．
16．We are strongly _____ to building a paper-making factory near our city，for it will cause a lot of pollution for us．（　　）
A．opposedB．disagreedC．bannedD．permitted
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A．such…thatB．too…thatC．rather…thatD．so…that
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A．being developedB．developing
C．to developD．to be developing
5．When the teacher came in，she found two students ______ by the window ______ books．（　　）
A．seated； readingB．seated； read
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B．show Jennifer's eased mind
C．show Jennifer's loneliness 
D．indicate the beauty of nature
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A．it was getting cold
B．she realized her parents were worried
C．she began to miss her parents
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A．Jennifer went home to fetch her favorite coat．
B．Jennifer's father was so worried that he couldn't take care of the outside garden．
C．Jennifer understood why the outside garden was left uncared for．
D．Jennifer's father used to be too strict with her．
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A．Relaxed→Lonely→Tired→Upset．
B．Angry→Relaxed→Fearful→Comfortable．
C．Fearful→Relaxed→Cheerful→Lonely．
D．Relaxed→Anxious→Shocked→Comfortable．
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     Named"Clean Space One"，the Swiss satellite finds its target and moves close to it．When it reaches its target，it will catch the junk with a gripping claw （抓手）．This is not going to be an easy task because both the satellite and the junk are traveling so fast．
     Once Clean Space One has caught the junk，all it has to do to get rid of it is to fly back to Earth．This is because the junk will bum up when traveling through the atmosphere．The satellite itself will burn up a'，the same time．
     Ever since people started to send objects into space more than 50 years ago，there has been junk in space．Junk on Earth like food wrappers （包装纸）or waste paper is also a problem．But space junk is mainly made up of exploded rockets and broken satellites．If no one cleans them away，they just keep traveling around Earth．
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45．According to the article，space junkD．
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    C．It will keep traveling around Earth．
    D．It will gather and become a large mass．
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    B．Catching space junk is difficult for a satellite．
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    D．The satellite goes back to space after it has finished its task．
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    A．The history of space junk dates back 50 years．
    B．Space stations travel in the same orbit as the junk．
    C．Space junk is harmless to people on Earth．
    D．It's impossible to stop space junk from colliding with spacecrafts．
10．With the oil price rising，these days people are trying to stay close to home _________ save money on gas．（　　）
A．helpsB．helpedC．helpingD．to help

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