↑ 收起筛选 ↑
试题详情

I won’t tell the student the answer to the math problem until he ________on it for more than an hour.

A. has been working  B. will have worked  C. will have been working   D. had 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