↑ 收起筛选 ↑
试题详情

During the flood many students volunteered ________ through the weekend, giving out food and water for the victims.

A.working      B.to work

C.to have worked      D.having worked

高三英语单项填空中等难度题

少年,再来一题如何?
试题答案
试题解析
相关试题