【题目】As many people do, you often pretend ________ work when actually you are just wasting time online.
A. doingB. to doC. to be doing D. to have done
在线课程【答案】C
【解析】
试题分析：考查固定短语和时态。句意：和很多人一样，你经常假装正在在工作，实际上你只是在网上浪费时间。pretend to do假装做某事，pretend to be doing假装正在做某事。故选C项。