单项选择题

______ I had walked for six hours, I was tired out.

A. After
B. Before
C. When
D. As
<上一题 目录 下一题>
热门 试题

单项选择题
______ you understand this rule, you'll have no further difficulty.
A. Once
B. Unless
C. As
D. Until
单项选择题
About ______ of these rooms ______ empty.
A. two third, are
B. two thirds, are
C. two thirds, is
D. two third, is
相关试题