--- He looks so tired. What’s wrong? --- Nothing serious. He just stayed up last

题型：不详难度：来源：

--- He looks so tired. What’s wrong?
--- Nothing serious. He just stayed up last night, ___________his papers.

A．to prepare

B．having prepared

C．prepared

D．preparing

答案

D

解析

试题分析：整个句子已经有谓语动词，所以该空应该用非谓语动词，又因为He与prepare之间是主动关系或伴随状语，故排除C；选项A表目的或将来，但是前面不用加逗号，故排除A；选项B表示它的动作发生在谓语动词之前，显然是错误的，故排除A，所以选D
点评：非谓语动词是高考热点也是考生比较难以理解的语法项目，故考生需要做一些这方面的试题来加以巩固。
即学即练：_________attentively，he forgot the time for lunch．
A. to Read      B. having read          C. Read     D. Reading
解析：D Reading attentively与he之间是主动关系，Reading attentively作原因状语。句意：由于在专心读书，他忘了吃午饭的时间。