---How did you do in the test yesterday? -----Not so well. I ______ much better

题型：不详难度：来源：

---How did you do in the test yesterday?
-----Not so well. I ______ much better but I misread the directions for writing.   

A．will have done	B．could have done
C．must have done	D．may have done

答案

B

解析

试题分析：句意：你昨天的考试怎么样？不是很好。我本可以做得更好的，但是我弄错了写作的方向。could have don have本可以做，但实际未做  will have done将已经做了某事
must have done肯定已经做了某事   may have done可能已经做了某事
点评：情态动词+完成时是高考必考语法点。情态动词无论是表达“推测和可能性”，还是表达“虚拟”这一概念，只要是对过去已经发生的事情进行描述，一律用“情态动词+have done”这一结构；对现在或将来的事情进行描述，用“情态动词+动词或系动词原形”。