问题
选择题
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
答案
答案：B
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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
答案：B