四川专升本考试：英语时态考题专练（六）

　　【考题】

　　16、She ought to stop working; she has a headache because she ________ too long.

　　A. has been reading B. had read

　　C. is reading D. read

　　17、—Why do you look worried?

　　—Fred left the company half an hour ago. His work ________ unfinished since.

　　A. left B. was left

　　C. has left D. has been left

　　18、 —You could have asked Mr. Johnson for help. He is kind-hearted.

　　—I ________ that. A whole day ________.

　　A. forget; wastes B. forgot; was wasted

　　C. forgot; had wasted D. forget; was wasted

　　【解析】

　　16、A。

　　从第一句话She ought to stop working 可知“他仍然在学习”，故后面用现在完成进行时态。

　　17、D。

　　受前一句left的影响，易误选B。题干中的since说明此处应用现在完成时态。从问句中也可看出来，此处强调动作对现在的影响，故要用现在完成时的被动式。

　　18、B。

　　说话之前“忘了”，故用一般过去时态;第二空应用一般过去时的被动语态形式。