问题补充：
把下列句子由主动语态改成被动语态,或由被动语态改成主动语态1.Did Tom repair the car yesterday?2.The curtain in the room has been taken down. They
答案：
was the car repaired yesterday?
they have taken down the curtain in the room.
$210 has been donated to the students in poor areas
has another bradge been built in their town?
the letter may be written by you in pencil
