问题
选择题
He rushed out of the burning house with the little boy in his arms ____________ the roof fell down and the boy was saved.
A．after
B．as
C．before
D．until
答案
答案：C
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He rushed out of the burning house with the little boy in his arms ____________ the roof fell down and the boy was saved.
A．after
B．as
C．before
D．until
答案：C