有一些句子,求把主动语态改成被动语态

题目

有一些句子,求把主动语态改成被动语态
His mother has written two letters to him recently
The Green have seen the movie twice
The boss made them work for twelve hours a day.
We often see her walk along the river after supper.
Do you often hear the girls sing in the next room?
I will show you the photos.
Miss Gao teaches us French in our school.
以上,全改被动
还有一句 Bill is repairing the desks and chair now

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