改成被动或主动句.

改成被动或主动句.
1.Do people use Chinese only in China?
1.______Chinese _____only in china?
2.They didn't visit the city two years ago.
2.The city _____ _____ _____them two years ago.
3.Where did you make them
3.Where _____they ______?
4.She was seen to come out of the library by him.
4.He _____ ______ ______ out of the library.
5.When are trees often pianted?
5.When ____people often _____ _____?
6.The League was founded in Guangzhou in 1922.
6._____ ______ _____ ______ the League _____?
7.Did the students wear the school clothes a lot
7._____the school clothes ______ a lot?
8.Kate.took good care of the baby yesterday evening.
8.The baby ______ ______ _____well by Kate yesterday evening.
9.His aunt bought nim a bicycle.
9.A bicycle _____ _______ ______him by his aunt.