We want to know whether the drug has an effect people's health.A. onB. to C. withD. in

问题补充：

We want to know whether the drug has an effect peoples health.

A. on

B. to 

C. with

D. in

答案：

(答案→)A. on

B. to 

C. with

D. in

解析：可联系答.案.网客服索取。