11. Dragon Bridge in Da Nang is the must-see for all lovers of architecture. A. in B. the C. all D. of 12. Po Nagar Kalan is the main tower, that is one of the tallest Cham structures. A. is B. that C. the tallest D. structures 13. We cleaned all the kitchen while our parents were out to dinner. A. cleaned B. while C. were D. to 14. Sometimes our efforts on protecting man-made wonders of the city aren’t full appreciated. A. on B. man-made C. aren’t D. full 15. I’d prefer leave early because I have a conference with my son’s teacher tomorrow at three A9. A. I’d B. leave C. have D. son’s 16. My mother planted some vegetables in the garden at 8 a.m last Sunday. A. planted B. in C. at D. last 17. My brother was talking on the phone when I walk into his room. A. were talking B. on C. when D. walk 18. Were you watching a film in TV when your father arrived home? A. were you watching B. in C. when D. arrived 19. John had a car accident last week while he drove down the street. A. had B. while C. drove D. down 20. Your brother was playing football this time yesterday, didn’t he? A. was playing B. this time C. didn’t D. he lm và giải chi tiết nữa nhé