【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
在线课程【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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