单项选择题

I had just stepped out of the bathroom and was busily drying myself with a towel ______ I heard the steps.

A．while
B．when
C．since
D．after
<上一题 目录 下一题>
热门 试题

单项选择题
We hope that as many people as possible ______ join us for the picnic tomorrow.
A．need
B．must
C．should
D．can
单项选择题
Some people in parts of the world are wasting food ______ some others haven't any.
A．since
B．when
C．as
D．while
相关试题