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

问题补充：

We shouldn’t spend 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：句意：我们不应该花那么多的钱去测试那么多的人，他们当中的许多人都是健康的。这是非限制性定语从句，先行词是many people，指人，故选D。