that was the reason------- Mr.Smith refused to speak for at yesterday's meeting A.WHY C.which

问题描述:

that was the reason------- Mr.Smith refused to speak for at yesterday's meeting A.WHY C.which
为什么选C

这题目卑鄙的地方在于,你要注意到speak后面偷偷跟着一个for.
因此只能选which了.