you had better take off your shoes before ______(enter)the room.填什么并说明

分类: 作业答案 • 2022-01-02 14:03:43

问题描述：

答

entering=when you enter，由于主语一致，可以用ing形式省略

答

entering
因为做介词before的宾语,必须用动名词形式
请及时采纳,多谢!

you had better take off your shoes before ______(enter)the room.填什么 并说明