单项选择题

______ we know the facts, we can’t do anything about it.

A. As long as
B. When
C. Once
D. Until
<上一题 目录 下一题>
热门 试题

单项选择题
If you think twice ______ you speak once, you will speak twice better for it.
A. after
B. when
C. as
D. before
相关试题