However,the incident was the only spark_____the fire.A．which set offB．set offC．t_刷题宝

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However,the incident was the only spark_____the fire.

A．which set off

B．set off

C．that set off

D．setted off

上一题下一题 0.64难度单项选择更新时间:2013-03-28 06:18:34

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