答案：C

题目分析：would rather do sth,have sb do, Who就是这里的sb, Who已经放在句首了所以后面就是have+do ;句意：你想让谁代替你去做演讲？故选C

点评：此题考生很容易出现错误，认为只是考查would rather do sth这个短语，而误选A，you是句子的主语，Who是have的宾语，此题同时也考查了考生的句子结构的分析能力。

即学即练：Whom would you rather ___with your sister?

A. have gone  B. have to go  C. have go   D. have going

解析：C 句意：你想让谁和你姐姐一起去？