2. When are trees often planted?(变为主动语态)
When__________ people often_________ ___________?
1. She was seen to come out of the library by him．(变为主动语态)
He_________ _________ ________ out of the library．
7. Seeing their teacher wearing a beautiful dress, all the girls screamed______ jealousy．
6.The young adults can get relaxation_____ reading cartoons or watching them on TV.
5. English is spoken__________ the first language in Canada．
4. It's said that the emperor Shen Nung discovered tea_______ accident．
3. The stamps are used________ sending letters．
2. -Was the heated ice cream scoop invented_______ Chelsea Lanmon?
--Yes, I think so．
1. I don't think the computer was invented_______ the telephone．
A．根据所听到的内容在短文空白处填上正确的单词
生词：cacao n．可可(树)；可可豆 ceremony n．典礼
Do you know how chocolate is 1 and what it is made of? When you walk into the 2 ，a lot of trees wm greet your 3 . But why are there so many trees, and not chocolate?
4 these are called cacao trees，and they can produce cacao beans．Chocolate is made of cacao beans，and the cacao beans have a 3 000 year 5 . And what is more 6 ，many people in dif ferent 7 of the world have Chocolate Ceremonies! At the ceremonies， 8 often rnake a very huge 9 of chocolate. Everyone can eat as much as he wants! Do you want to 10 them?
B．根据所听短文内容选择最佳答案
生词：secretary n．秘书
1. Sam telephoned his__________.
A．sister
B．mother
C．sister's son
2. Sam called to_______．
A．tell his sister something
B．the teapot to another place
C．he wanted his sister to call back
3. Sam told Tom to move the teapot because_______.
A．the teapot was in the wrong place
B．the teapot should be on the bed
4. When Sam's sister came back home
A．Tom told her who had telephoned her
B．Tom told her who wanted him to move the teapot
C．she called back to ask Sam why the teapot was on the bed
5. The chair was put on the desk because_________.
A．the secretary wanted to remember who telephoned Sam
B．the secretary wanted to clean the office
C. Sam’s sister called back to ask the secretary to do it