Question

【题目】 ______ for two days, Steve managed to finish his report on schedule.

A. To workB. Worked

C. To be working D. Having worked

Answer 1

【答案】D

【解析】

试题分析：句意：工作了两天，Steve成功的按时完成了他的报告。句中的逻辑主语为Steve，与work之间为主动关系，故用现在分词，这里用having worked，表示动作的先后性，work这个动作发生在谓语动作之前。故选D。