把下列主动语态的句子转换成被动语态的形式

题目

把下列主动语态的句子转换成被动语态的形式
1.They will send you a bill at the end of the month.
2.Students must clean their classroom everyday.
3.You can't use a dictionary in the exam.

答案

1.A bill will be sent to you by them at the end of the month.
2.Classroom must be cleaned by students everyday.
3.Dictionary can't be used by you in the exam.