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1.He’s been studying day and night for his final exam.I warn

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1.He’s been studying day and night for his final exam.I warned him many times to prepare earlier,but he _________ listen.
A.woundn’t B.shan’t C.shouldn’t D.won’t
2.Although there is no life on Mars now,some scientists think that there ______ some form of life a long time ago.
A.may have been B.might have had
3.Bill,an auto-repair man,________ over 80on intelligence tests.Yet,when anyting went wrong with a car,he always fixed it.
A.couldn’t possibily have scored B.couldn’t possibly score
4.All children need to be creative is _______ whatever activity they are doing their own.
A.being free to make B.free to make
c.to be free making D.to free to make
5._________ a good example for their children,parents are not only giving them a good model to imitate but also helping them to increase their chances for survival.
A.By setting B.to set C.For setting
1.He’s been studying day and night for his final exam.I warn
1.A 很明显此处要用过去的时态 另外wouldn't有不愿意的意思 也符合语境
2.B a long time ago决定了此处要用过去的时态
3.A 强调过去不可能 而还是有例外 如果选B的话就表示一直都不可能 不存在例外
4.B free to do sth.是固定搭配 所以答案在A和B之间 而A表示的是一直处于这种状态 语境不符
5.B 此处用to do作目的状语 意思是为了.