—How was that?—I was chatting on line ______ the power went out.A．becauseB．whil_刷题宝

题干

—How was that?
—I was chatting on line ______ the power went out.

A．because

B．while

C．as

D．when

上一题下一题 0.64难度单项选择更新时间:2013-11-12 03:00:46

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