Exercise 2: Chọn phương án đúng để hoàn thành mỗi câu sau đây 1. When in international trade, letters of credit are very convenient. A. using B. are used C. used D. they used 2. The 26th Annual Meeting of the Asia-Pacific Parliamentary Forum (APPF) in Hanoi, our beautiful and peaceful capital city, from January 18th to 21st, 2O18. A. was held B. is held C. is being held D. will be held 3. We were made hard when we were at school. A. to study B. study C. studying D. studied 4. Her fiance is said from Harvard University five years ago. A. having graduated B. to have graduated C. being graduated D. to be graduated 5. Only one of our gifted students to participate in the final competition. A. was choosing B. chosen C. has been chosen D. have been chosen 6. They cancelled all flights because of fog. A. All flights were cancelled by them of fog. B. All flights were because of fog were cancelled. C. All flights were because of fog cancelled. D. All flights were cancelled because of fog. 7. This building finished by the end of last year but there have been so many strikes that it isn't finished yet. A. will have been B. should have been C. was to have been D. may not have been 8. As a small boy, he was used to alone in the house for an hour or two. A. being left B. leaving C. be left D. leave 9. DNA tests accepted in court eases. A. are known B. were used C. have been D. will have 10. Ann hoped to join the private club. She could make important business contact here. A. being invited B. to invite C. to be invited D. inviting 11. Despite their normal cylindrical form, some of the documents on silk that were found at Mawangdui, an archaeological site in southeastern China, were folded into rectangles. A. wrote B. written C. were written D. be written 12. The boy by the teacher yesterday. A. punished B. was punished C. punish D. punishing 13. Robots will even everywhere in factories, schools, offices, hospitals, shops, and homes. A. seen B. see C. saw D. be seen 14. We don't allow anyone to use their cell phones during the examination. A. Nobody is allowed to use their cell phones during the examination. B. Nobody is allowed using their cell phones during the examination. C. Nobody isn't allowed to use their cell phones during the examination. D. Nobody isn't allowed using their cell phones during the examination. 15. Everyone likes when they have got some success. A. to be congratulated B. being congratulated C. to be congratulating D. to congratulate Giúp mình nha mn! Cảm ơn!