In fact, I wonder _________ my efforts were all in vain.A．thatB．whichC．whyD．wher_刷题宝

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In fact, I wonder _________ my efforts were all in vain.

A．that

B．which

C．why

D．where

上一题下一题 0.64难度单项选择更新时间:2013-12-12 08:33:06

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