问题

I had just stepped out of the bathroom and was busy drying myself with a towel ________ I heard the steps[ ]

A: while
B: when
C: since
D: after

正确答案是：

同类题型

I found Mary _________ a red blouse this morning.—But I think she looks better in yellow.

_____when she started complaining

下列各句中，没有语病的一项是

It is not _____ that you are so depressed recently; you are suffering from so much pressure. [ ]

Tom, my new computer doesn’t work very fast.— Don’t worry, you know, the Internet sometimes _______ be very slow. [ ]