Last month 3 people got injured in a gas explosion, has not been discover_刷题宝

题干

Last month 3 people got injured in a gas explosion, has not been discovered yet.

A．whose cause

B．the cause of that

C．which cause

D．the cause

上一题下一题 0.64难度单项选择更新时间:2014-01-08 10:11:01

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