The roof fell ____ he had time to rush out.A．untilB．beforeC．whenD．Since_刷题宝

题干

The roof fell ____ he had time to rush out.

A．until

B．before

C．when

D．Since

上一题下一题 0.64难度单项选择更新时间:2015-02-10 03:34:27

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