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The villagers have already known ______ we'll do is to rebuild the bridge.

A.this 

B.that

C.what 

D.which

C解析:句意:村民們已經(jīng)知道我們要重建這座橋。分析句子結(jié)構(gòu)可知,known后跟賓語從句,省略了連接詞that。此賓語從句中又包含一個主語從句,主語從句中do缺少賓語,所以用what引導(dǎo)該從句作整個賓語從句的主語,答案為C項。

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