问题
选择题
I had just stepped out of the bathroom ______ I heard the steps.
A．while
B．when
C．since
D．after
答案
答案：B
搜题请搜索小程序“爱下问搜题”
I had just stepped out of the bathroom ______ I heard the steps.
A．while
B．when
C．since
D．after
答案：B