题目内容
Mr. Smith ________ these days. I think he should take a holiday before he burns out.
A. has been overworking B. overworked
C. had overworked D. was overworking
答案:A 考查时态。结合本句中的时间状语these days以及下一句中的时态可知史密斯先生这些天一直在过度工作,所以用现在完成进行时。

练习册系列答案
相关题目