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1.A computer ______ think for itself.It's always told to do things.(  )
A.mustn'tB.can'tC.shouldn't

分析 电脑不能够自己思考,他总是去做被要求做的事情.

解答 答案:B.
mustn't 不允许,禁止"; can't不能; shouldn't不应该.此处句子强调的是:电脑不能够自己思考,他总是去做被要求做的事情,所以B合适表不能.故选B.

点评 本题考查了情态动词的用法.解答时注意理解句意以及所给选项的意思并作出正确选择.

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