8.John was seen to cross the street just now by someone.

　Someone saw John _____the street just now.

　 another way be thought of to keep your wine or water warm?

　Can ________ another way to keep your wine or water warm?

7. A birthday party will be had tomorrow.

　We ______a birthday party tomorrow.

6.They built a bridge between the two islands lastyear.

　A bridge __________ between the two islands lastyear.

　B.改为主动语态

5. They produce silk in Suzhou.

　Silk _________ in Suzhou.

4. The teacher made the students copy the text.

　The students ______________ copy the text.

3.The workers built the Green Great Wall across the northern part of the country.

　The Green Great Wall ________ across the northern part of the country.

2. Where did they plant trees?

　Where ______ trees ______?

1. We call maths the language of science.

　Maths _____the language of science.

10.If you let him try and then he will know all about it.(改为祈使句)

　______ ,______ he'll know all about it.

　Ⅷ. 主动语态与被动语态相互转换

　A.改为被动语态

9. Let us go and see what has happened.(完成反意疑问句)

　Let us go and see what has happened,_____?