英语题，急！！！

1.The window wasn't broken by Li Lei.
___Li lei didn't break the window_____________________________________
2.The bridge will be built next year.(we)
_We will build the bridge next year______________________________________
3.How often is your classroom cleaned?
____How often do you clean your classroom?___________________________________
4.The exercise must be finished at school.(we)
____We must finish the exercise at school____________________________________________

1.Li Lei didn't break the window.
2.We will build the bridge next year.
3.How often do you clean your classroom?
4.We must finish the exercise at school.

Li Lei didn't break the window.
We'll build the bridge next year.
How often do you clean your classroom ?
We must finish the exercise at school.