将下面个句改为被动语态

1 Her friends sent many nice presents.
many nice presents were sent by her friends.

2 We must correct all the mistakes at once.
all the mistakes must be corrected at once.

3 They don't speak English after class.
English was not be spoken after class.

4 Who wrote the letter?
the letter was wrote by who?

5 Will thy put off the match because of the heavy rain?
Would the match be put off because of the heavy rain?

many nice presents were sent by her friends.
all the mistakes must be corrected at once.
English was not be spoken after class.
the letter was wrote by who?
Would the match be put off because of the heavy rain?

这个问错地方了，应该到英语那边