I wonder ( ) is responsible for the safety of the passengers.

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查看11 | 回复1 | 2011-5-15 22:49:39 | 显示全部楼层 |阅读模式
A.it is who that
B.that it is who
C.who it is that
D.who it is that
I'm sorry. C.who is it that

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千问 | 2011-5-15 22:49:39 | 显示全部楼层
I will take D.
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