[单选题]You _____all those calculations! We have a computer to do that sort of thing.
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2023-10-01 08:03:10
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[单选题]You _____all those calculations! We have a computer to do that sort of thing.

A.needn't have done
B.shouldn't have done
C.must not have done
D.can not have done
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国家开放大学

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