We shouldn’t spent our money testing so many people most of are healthy. A. thatB. which

问题补充：

We shouldn’t spent our money testing so many people, most of are healthy.

A. that

B. which

C. what

D. whom

答案：

A. that

B. which

C. what

(答案→)D. whom

解析：由于先行词为so many people，故关系代词只能用whom，而不能用其他三个。