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A. is built B. built C. were built D. was built 3. This work _____at once. A. needn’t be done B. need to do C. need do D. need done 4. Computers ___ all over the world. A. is used B. are using C. are used D. used to B A C C ? 5. Great changes_____ in the past ten years in China. ? A. took place B. have taken place ? C. have been taken place D. had taken place 6. Salt in all supermarkets _____ yesterday. A. sells out B. selling out C. was sold out D. were sold out 7. Her voice ____sweet. A. is sounded B. is heard C. sounds D. sounding book _____well. A. is sold B. sells C. sell D. selling. B C C B ? 9. A birthday present ______ me by my mother . ? A. bought B. was bought ? C. was bought for bought to ? 10. An apple ________ me. ? A. was given B. was given to ? C. was gave to D. were given to ? book ____ by his mother . ? A. can’t be written B. can be not written ? C. can’t be wrote D. be written ? 12. Must the old people ________ politely? A. are spoken to B. be spoken C. speak to D. be spoken to C B A D