You ______ all those calculations! We have a computer to do that sort of thing.A

游客2023-09-25  16

问题 You ______ all those calculations! We have a computer to do that sort of thing.

选项 A、needn’t have done
B、must not have done
C、should not have done
D、can not have done

答案 A

解析 句意:你本不必做所有这些计算!我们有电脑来处理这类事情。must not的意思是“不应,不可以”,后面一般不接完成式;C项表示“本应当做”,与句子意思相矛盾;D项表示“不可能做”,亦显然与句意不符;只有A项needn’t have done表示“本不必做,实际上做了”的含义,与题意相符。
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