Before the drug is used on human beings, experts have to______dogs.

admin2014-10-11 59

问题 Before the drug is used on human beings, experts have to______dogs.

选项 A、be experimented
B、experiment
C、experiment with
D、experiment on

答案D

解析 experiment on“对……进行实验”；experiment为不及物动词。

转载请注明原文地址:https://www.kaotiyun.com/show/6pxO777K

成人本科学位英语

相关试题推荐

随机试题

最新回复(0)