单项选择题

I have no idea how it ______ that the man met with trouble again.

A．came about
B．came out
C．came up
D．came across
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单项选择题
It was twelve o'clock at midnight ______ they arrived at a ______ village.
A．since; alone
B．before; lonely
C．that; lonely
D．when; lonely
单项选择题
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
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