文档介绍：单选题
【模拟试题】
1. The children_____ to swim last month and they can swim very well now.
A. are taught     B. were taught     C. have taught      D. taught
2. —Look ! What a nice garden !  —Yes. It _____ every day.
A. has been cleaned    B. is cleaned    C. is being cleaned    D. was cleaned
3. It is said that potato chips_____ by mistake a hundred years ago.
A. invent      B. invented     C. are invented      D. were invented
4. —How beautiful our hometown is ! —Yes, trees and flowers _____ everywhere.
A. can be seen      B. can see     C. be seen     D. can't see
5. Some people think trees _____ on Tree Planting Day only.
A. should be planted      B. should plant   C. should be planting    D. be planted
6. puters _____in 1976. It has changed the whole world.
A. have been invented    B. are invented     C. were invented    D. invented
7. —Do you know who designed the CD-ROM Around the world in Eight Hours?
 —Yes. It ______ by Nancy Jackson.
A. has designed     B. designed      C. was designed      D. designs
8. The window______ ten minutes ago, and the room is bright now.
A. can be cleaned      B. is cleaned    C. was cleaned    D. will be cleaned
9. This kind of food_____ cool, clean and dry according to the instruction.
A. should be carried    B. must be put   C. should be placed   D. must be kept
10. —Where did you go last night? —I_____ to go to Li Lei's bi