Question

【题目】When the boss came in, the workers pretended ______ hard on their machines.

A. to workB. to be working

C. to have workedD. working

Answer 1

【答案】B

【解析】

考查固定结构。句意：老板进来时，工人们假装在机器上努力工作。固定结构：pretend to be doing sth.“假装正在做某事”。故选B。