赞题库-背景图
单项选择题

I keep fit ______ playing tennis every day.

A. by
B. on
C. for
D. in
<上一题 目录 下一题>
热门试题

单项选择题The apples are ______ fast in such hot weather.

A. got rotting
B. getting rotting
C. got rotten
D. getting rotten

单项选择题He muffled his voice to avoid ______.

A. having been identified
B. to be identified
C. identified
D. being identified