↑ 收起筛选 ↑
试题详情

All the students ______ their study _______ all the lights went out.

A.were paying their attention on; when B.were fixing their attention on ;when

C.were fixing their attention to;  while D.had been focused on; while

高二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