--- I think the environment is becoming worse and worse.--- Yes, I really don’t

题干

--- I think the environment is becoming worse and worse.
--- Yes, I really don’t know we can do about it.

A．which

B．whether

C．that

D．what

上一题下一题 0.85难度单项选择更新时间:2011-09-06 11:34:46

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