英语的被动语态~急

题目

英语的被动语态~急
1.They should clean the room every day.
2.We must plant the trees in spring.
3.You may answer yhe question in easy English.
4.Can the builders finish the work this evening?
5.You don't have to take these books out of the reading room.

答案

The room should be cleaned.
The trees must be planted...
The question could bu answered...
Can the work be finished by the builders...
These books don`t have to be taken out of...