________ is impossible for us to offer him any help.A．ThisB．ItC．ThatD．which_刷题宝

题干

________ is impossible for us to offer him any help.

A．This

B．It

C．That

D．which

上一题下一题 0.64难度单项选择更新时间:2013-03-11 09:02:38

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