A computer ________ think for itself; it must be told what to do.
A.can'tB.couldn'tC.may notD.might not在线课程A
解析：
考查情态动词的运用。这句话的意思：“计算机本身不能思考它必须被告知做什么”因此这里所表示的是计算机本身的能力。
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