9. I've never heard the word using in spoken English. A. 错误 B. 正确 ...

4. I have nothing to say on this question. A. 错误 B. 正确 ...

19. Most of the photographers ______ to the meeting were from north Europe. A. invited B. to invite C. being invited D. having invited ...

9. The teacher came into the classroom ______ by his students. A. following B. to be following C. followed D. having followed ...

4. We looked everywhere for the keys, but they are nowhere _______. A. to find B. to have found C. to be found D. being found ...

9. How much books do you want to buy? A. 错误 B. 正确 ...

4. What good children they are! A. 错误 B. 正确 ...

19. I asked him whether he had done all the work himself ______ he had had any assistance. A. and B. but C. nor D. or ...

14. New computers ______ all over the world. A. is used B. are using C. are used D. have used ...

9. Information technology is taught in most schools, ______ we have entered the information society. A. so B. while C. still D. for ...