单项选择题

______ one has a child will one realize how great one's parents are.

A. Until
B. Not until
C. It is not until
D. Until not
<上一题 目录 下一题>
热门 试题

单项选择题
There is no easy solution to Japan's labor ______.
A. decline

B. vacancy
C. rarity

D. shortage
单项选择题
In the experiment we kept a watchful eye ______ the developments and recorded every detail.
A. in
B. at
C. for
D. on
相关试题