()3.It rained heavily last night. The ground ______ water now. You must be careful.
A.is cover with
B.covers with
C.was covered with
D.is covered with

D

()4.______ the window, please. Windows should ______ in such cold weather.
A.Be closed; close
B.Be closed; be closed
C.Close; be closed
D.Close; close

C

()5.— What art form do you think is ______, sky lanterns, paper cutting or clay art?
— Paper cutting.

A.more common
B.the most common
C.most easiest
D.easier

B

三、按要求完成句子。
1. We call math the language of science. (改为被动句)
Math the language of science.
2. Where did they plant trees? (改为被动句)
Where trees by them?
3. They produce silk in Suzhou. (改为被动句)
Silk in Suzhou by them.
4. The teacher made the students copy the text. (改为被动句)
The students copy the text by the teacher.
5. They built a bridge between the two islands last year. (改为被动句)
A bridge between the two islands by them last year.
6. A birthday party will be given tomorrow by us. (改为主动句)
We a birthday party tomorrow.
7. John was seen to cross the street just now by someone. (改为主动句)
Someone John the street just now.
8. People used to send out sky lanterns when they were in trouble. (改为同义句)
People used to send out sky lanterns trouble.

1.is called 2.were;planted 3.is produced 4.were made to 5.was built 6.will give 7.saw;cross 8.when/while in