You______ all those calculations! We have a computer to do that sort of thing. （3.0分） 3.0 分 A、 needn’t have done B、 must not have done C、 shouldn’t have done D、 can not have done

You______ all those calculations! We have a computer to do that sort of thing.
（3.0分）
3.0 分

A、

needn’t have done
B、

must not have done
C、

shouldn’t have done
D、

can not have done

出自：兰州工业学院-计算机应用技术-大学英语（一）

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