Question

【题目】The doctor warned us ______ the ______ of the germs(病菌) by cleaning our hands from time to time.

A. controlling, spread

B. to control, spread

C. to control, development

Answer 1

【答案】B

【解析】

试题分析：句意：医生警告我们要通过经常洗手来控制病菌的传播。此题考查固定短语warn sb to do sth警告某人做某事。根据句意，应选B。