将下列句子改为被动语态 1.They will send you a bill at he end of the month.
问题描述：
将下列句子改为被动语态 1.They will send you a bill at he end of the month.
2.We must look after young trees well.
3.You must correct your mistakes in your exercises.
4.You can't use a dictionary in the exam.
答
A bill will be sent you at the end of the month.
Young trees must be looked after well by us.
Your mistakes in your exercises must be corrected by you.
A dictionary can't be used by you in the exam.