`21.` drove

`-` Quá khứ đơn : S + V-ed/c2

`-` DHNB : ten minutes ago

`22.` closed

`-` DHNB QKD : last year

`23.` Did-spend

`-` Quá khứ đơn : Did + S + V-inf + ... ?

`-` DHNB : last month

`24.` were playing

`-` QKTD : S + was/were + V-ing + ...

`-` DHNB : at this time yesterday

`25.` was watching

`-` DHNB QKTD : at 7pm yesterday

`26.` was sitting

`-` S + was/were + V-ing + when + S + V-ed/c2

`-` Diễn tả 1 hành động đang xảy ra thì 1 hành động khác xen vào.

`27.` moved

`28.` applied

`-` DHNB : two weeks ago

`29.` watches-helps

`-` Hiện tại đơn : S + V-es,s

`-` DHNB : usually

`30.` will visit

`-` CDK loại `1` : If + S + V-es,s + .... , S + will/can/must + V-inf + ...

`31.` will you go

`-` Tương lai đơn : Wh + will + S + V-inf + ... ?

`-` DHNB : next summer

`32.` invaded

`-` DHNB : in the 9th century

`33.` doesn't rain

`-` CDK loại `1`.

`34.` is being taken place

`-` Bị động HTTD : S + am/is/are + being + Vpp

`-` Mang nghĩa tương lai.

`35.` grew

`36.` was sleeping-hit

`37.` understanding

`-` have difficulty (in) V-ing : khó khăn trong việc làm gì

`38.` visiting

`-` How about + V-ing + ... ?

Đáp án :

21 . The policeman drove away ten minutes ago.

→Quá khứ đơn : S + V-ed/c2

→DHNB : ten minutes ago

22. They closed the cookie factory last year.
→DHNB QKD : last year
23 . Did you spend a lot of money last month?

→Quá khứ đơn : Did + S + V-inf + ... ?

→DHNB : last month

24. At this time yesterday, we were playing tennis.
→QKTD : S + was/were + V-ing + ...

→DHNB : at this time yesterday

25 . At 7 pm yesterday, he was watching TV.
→ DHNB QKTD : at 7pm yesterday
26 .He was sitting in a car when I saw him.

→S + was/were + V-ing + when + S + V-ed/c2

→Diễn tả 1 hành động đang xảy ra thì 1 hành động khác xen vào.

27.Many people moved to new places and found a safe place when they heard about the storm.
28. I applied for a summer sports camp in England two weeks ago.
29. Minh often watches movies in English and it helps improve his English.
→Hiện tại đơn : S + V-es,s

→DHNB : usually

30. We will visit the Statue of Liberty and Ellis Island if we go to New York.

31. Where will you go on your vacation next summer?

32. The Vikings invaded Ireland in the 9th century.

33.If it doesn't rain tomorrow, we'll go out to Edinburgh Castle.
 
34. The 12th English Language Teaching Conference took place on June 5-12.

35. In the late 1980s, Ireland's economy was growing rapidly.

36. Everyone was sleeping when the earthquake hit the small town two days ago.

37. Do you have difficulty understanding your Australian friends?

38. How about visiting medieval castles? I think that's really interesting.