Chọn thì thích hợp nhất để hoàn thành các câu sau: 28. The train ______ when I ______ at the station. A. already left / had arrived B. already had lef

Chọn thì thích hợp nhất để hoàn thành các câu sau:
28. The train ______ when I ______ at the station.
A. already left / had arrived B. already had left / arrived
C. left already / had arrived D. had already left / arrived
29. Everyone was asleep when the enemy _____________
A. had attacked B. attacked C. was attacking D. attacking
30. Don’t make noise. My mother ________________with her friends.
A. talked B. talks C. is talking D. was talking
31. She ______ the piano since she ______ ten years old.
A. played / was B. has played / has been C. has played / was D. had played / was
32. Up to now, I _________________ a lot of information about her.
A. learnt B. would learn C. learn D. have learnt
33. Mary ___________ in London for 15 years.
A. lives B. was living C. is living D. has lived
34. We were disappointed that most guests ___________ when we arrived at the party.
A. had left B. has left C. left D. leave
35. He never goes home before he ______ his work.
A. finished B. has finished C. had finished D. finishing
36. Before cars ______, people ______ horses and bicycles.
A. were discovered / had used B. has been discovered / have been using
C. is discovered / using D. discovering / used