帮我把这几个句子改成被动语态 不难
1.They speak English in Canada.
2.People use wood for making tables.
3.They made computers in the USA.
4.They will grow rice in South China.
5.They plant these trees in speing.
6.The workers built the bridge in 1968.
7.People invited Yao Ming to play basketball in the USA.
8.We have planted trees around the lake.
9.We must repair the computer now.
10.The teacher made him do his homework.