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    【题目】A computer ____________ think for itself; it must be told what to do.

    A. can’t B. couldn’t

    C. may not D. might not

    【答案】A

    【解析】考查情态动词。因为can强调能力,could强调事情发生的可能性.此处句子强调的是：电脑不能够自己思考,只能服从人类的指令.所以A合适.

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