---Howdidyoudointhetestyesterday?-----Notsowell.I______muchbetterbut

---How did you do in the test yesterday? -----Not so well. I ______ much better but I misread the directions for writing. A.will have doneB.could have doneC.must have doneD.may have done

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可能已经做了某事考点：情态动词+ have done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”。

感谢回答，我学习了