问题
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
答案
答案：B
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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