英语－把主动语态变成被动语态

1.English is spoken in many countries.
2.This bridge was built by us last year.
3.The little girl was frightened by the tiger in the zoo.
4.You have been invited to a lunch party by Xiao Liu .
5.These magazines can't be taken out of the reading-room.
6.The problem will be discussed by us at tomorrow's meeting.
7.Have the birds been fed by anybody?
8.The accident will never be forgotten by people.
9.This letter may be written in pencil by you .
10.The car in the garage is being repaired.