I saw Mr. Zhang a moment ago. He ______ to Germany.
A. can't go
B. couldn't have gone
C. mustn't go
D. mustn't have gone
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His grandfather is looking forward to ______ to his native place some day.
A. return
B. being returned
C. returning
D. be returning
If a Chinese ask an Englishman this question"Have you eaten？",the Englishman might______.
A. think that Chinese wants to invite him to dinner
B. not answer the question
C. be very happy
D. think it has nothing to do with other people
The weather changes very often in Britain because______．
A. the country has many big forests
B. the country is a very large dryland
C. the country is a small island
D. the country's sky is not clean
Why are some scientists interested in studying aging problem？
A. They want to increase the general ability of our bodies．
B. They may be able to find a better way of our life．
C. If they can pin down the biochemical process that makes us age,there will be hope for extending the length of life．
D. They want to find out ifthere is a link between how efficiently a cell could repair itself and how long a creature lives．
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