Have the villagers already known we’ll do is to rebuild the bridge?
A. this
B. that
C. what
D. which
网友回答
A. this
B. that
(答案→)C. what
D. which
解析：考查名词性从句。known后跟宾语从句作宾语，宾语从句中包含一个主语从句 we’ll do，do后缺少宾语，用what引导宾语从句并在从句中作宾语；this不能引导从句，that引导名词性从句，本身无意义，只起引导作用，which指“哪一个”，排除A、B、D，故选C。