单项选择题

His ears are highly sensitive ______ any unusual sound in the machine.

A．of
B．on
C．to
D．by
<上一题 目录 下一题>
热门 试题

单项选择题
He ______ a sum of money every week for his old age.
A．sets up
B．sets out
C．sets against
D．sets aside
相关试题