题目

题型：不详难度：来源：

He ________ all his aims. But his efforts in the past few years have been praise-worthy.

A．could have achieved	B．wouldn’t have achieved
C．must have achieved	D．may not have achieved

答案

D

解析

试题分析：考查情态动词的完成式：句意：他可能不会达到所有的目标，但是他过去几年的努力是值得表扬的。could have done，过去可能做了…，wouldn’t have done过去本来不会做而做了， must have done过去一定做了，may not have done过去可能不会做，选D符合句意。