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第1题

.When a spacecraft travels, one of the major problems is reentry into the Earth’s _______. 　A. surface B.atmosphere C
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第2题

In order to increase our output, we need to import more production _______. 　A. facilities B.hens C.votes D.artists
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第3题

We can not trust him any more because he often ________ his duty. 　A. owes B.spoils C.deserts D.neglects
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第4题

John _______ to be a polite man. But in fact he is very rude. 　A. pretends B.assures C.affords D.melts
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