You all those calculations! We have a computer to do that sort of thing.A.needn’
来源：网络
时间：
推荐文章
You_____ all those calculations! We have a computer to do that sort of thing.
A.needn’t have done
B.must not have done
C.shouldn’t have done
D.can not have done
试题答案
A
情态动词用法。A本不需要做某事却做了；不存在B这个结构；C本不应该做某事却做了。D不可能做了某事。句意：你本不需要做所有的计算。我们有计算机做这样的事情。