题目内容
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
答案:B
提示:
提示:
|
本题考查“be doing…when”结构,意思是“正在……此时……”。其他搭配还有be about to do…/had done sth./be on the point of doing…when。 |
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