60. They produce silk in Suzhou.(改为被动句)

　Silk _________ _________ in Suzhou.

59.The teacher made the students copy the text.改为被动句

　The students _________ _________ _________ copy the text.

58. You can borrow two books at a time.(改为被动句)

　Two books _________ _________ _________ at a time.

57. Where did they plant trees? (改为被动句)

　Where _________ trees _________?

56. We call maths the language of science. (改为被动句)

　Maths _________ _________ the language of science.

1. 主动语态与被动语态相互转换，每空一词(含缩写)。

20. ______ knows little about the weather in Sydney,______ she?

19. Jim knows the way Australia speak, ________ ______?

18. There is little water in the glass, __________ ________?

17. It’s summer in Australia now, _ _____ ______?