改被动语态改为被动语态①.We don't clean the classroom every day ②Do many

同学,很高兴回答你的问题
正确答案：
①.We don't clean the classroom every day
The classroom isn't cleaned by us every day.
②Do many people visit our school every day
Our school is visited by many people every day?
③Is french taughe by them in this college (改为主动语态）
Do they teach French in this college?
④Bicycles aren't produced by them in this factory.(改为主动语态)
They don't produce bicycles in this factory.
⑤He usually sees his grandfather on sundays .
His grandfather is usually seen by him on Sundays.
⑥Does Mary do a lot of reading every day
Is a lot of reading done by Mary every day?
⑦Is the noise made by Jim
Does Jim make the noise?
⑧He is given many presents by his uncle sometimes
Does his uncle sometimes give him many presents?
⑨We may put the flowers in the classroom
The flowers may be put in the classroom by us.
⑩Four years ago that machine was used to make bikes for children(改为主动语态)
Four years ago we used that machine to make bikes for children.
⑾Theymade this kind of wine from grapes
This kind of wine was made from grapes by them.
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第二题，2，Is our school visited by many people every day?