cần gấp với ạ 1. Not only to determine the depth of the ocean floor, but it is also used to locate oil. A. seismology is used B. using seismology C. is seismology used D. to use seismology 2. advised on what and how to prepare for the interview, he might have got the job. A. Had he been B. If he had C. Unless he had been D. Were he to be 3. Not until 1856 across the Mississippi River. A. the first bridge was built B. was the first bridge built C. the first bridge built D. did the first bridge build 4. Only when you grow up, the truth. A. you will know B. you know C. do you know D. will you know 5. Mozart was an accomplished compose while still a child. A. Remarkable as it seems B. As it seems remarkable C. No matter remarkable it seems D. Remarkable however it seem 6. Out for a walk after she finished doing her homework. A. did Mary go B. Mary went C. Mary did go D. went Mary 7. she could not say anything. A. So upset was she that B. So upset was she C. However upset was she that D. Therefore upset was she that 8. with my previous job, I would have won a higher promotion and I in this unfortunate position now. A. Unless I had stayed / am not B. If I stayed / would not be C. If had I stayed / will not be D. Had I stayed / would not be 9. Not only to speak to him, but she also vowed never to see him again. A. she refused B. did she refuse C. she did refuse D. when she refused 10. an emergency arise, call 911. A. Should B. If C. Will D. Were 11. Nowhere in the northern section of the United States for growing citrus crops. A. is there suitability of the climate B. where the climate is suitable C. the climate is suitable D. is the climate suitable 12. Only after she had finished the course did she realize she a wrong choice. A. had made B. has made C. had been making D. was making 13. Never him stand on the deserted station platform. A. will I forget to see B. I will forget to see C. will I forget seeing D. I will forget seeing 14. The instructor blew his whistle and A. off the runners were running B. off ran the runners C. off were running the runners D. the runners runs off 15. Seldom far enough north to disturb South Pacific shipping lanes. A. Antarctic icebergs will move B. will Antarctic icebergs move C. will move Antarctic icebergs D. move Antarctic icebergs will 16. will China be the first to use nuclear weapons. A. At any time B. At no time C. At a time D. At one time 17. He listened so attentively that not a word A. he had missed B. he missed C. he didn't miss D. did he miss 18. We spent nearly 3 hours waiting outside the station, then out A. the star came B. did the star come C. came the star D. be the star coming 19. The African killer bees could not be handled safely, nor A. their honey could be harvested B. harvested could their honey be C. could not their honey be harvested D. could their honey be harvested 20. Down when he was passing under the tree. A. an apple fall B. an apple fell C. did an apple fall D. fell an apple