1. Look! All of your dirty clothes _____ by your mother last night.
A. was washed
B. washed
C. was washing
D. were washed
2. Do you know that your homework _____ on time?
A. must hand in
B. must be handed in
C. must be handed
D. were handed in
3. A lot of new schools _____ in our city next year.
A. are building
B. will be built
C. will build
D. are built
4. These stamps _____ for sending letters.
A. are used
B. are using
C. used
D. be used to
5. A lot of teachers _____ to work in the west of China next year.
A. are asked
B. are asking
C. will be asked
D. will ask
6. More and more trees _____ to protect our environment.
A. should plant
B. should be planting
C. should be planted
D. must plant
7. All of the mistakes in my test paper _____.
A. have corrected
B. corrected
C. have been corrected
D. have been correcting
8. Look! A tall building _____ in my school now.
A. is being built
B. is building
C. builds
D. is built
9. Do you know that telephone _____ before the computer?
A. is invented
B. was invented
C. invented
D. was inventing
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