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【单选题】
You ______ all those calculations ! We have a computer to do that sort of things.
A.
needn’t have done
B.
shouldn’t have done
C.
D.
C. must not have done
E.
D. could not have done
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
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