单项选择题

The reason for their unusual behavior remains a puzzle.

A. fact
B. mystery
C. statement
D. game
<上一题 目录 下一题>
热门 试题

单项选择题
In judging our work you should take into consideration the fact that we have been very busy recently.
A. thought
B. mind
C. account
D. memory
单项选择题
There is no risk to public health.
A. point
B. danger
C. chance
D. hope
相关试题