`text{31.We started learning English 4 years ago.}`

`text{32.My father has given up smoking since last year.}`

`text{33.They started working in that factory in 2001.}`

`text{34.Lan didn't wrote for Maryam a month ago.}`

`text{35.He started living in Hanoi when he was 12.}`

`text{36.I didn't see her a long time ago.}`

`text{37.How long ago did you learn French?}`

`text{38.How long have you listened to classical music?}`

`text{39.I haven't seen her for 10 years.}`

`text{40.When did you buy this car?}`

Đáp án:

31 We started learning English 4 years ago.31.We started learning English 4 years ago

32 My father has given up smoking since last year.32.My father has given up smoking since last year

33 They started working in that factory in 2001.33.They started working in that factory in 2001

34 Lan didn't wrote for Maryam a month ago.34.Lan didn't wrote for Maryam a month ago

35 He started living in Hanoi when he was 12.35.He started living in Hanoi when he was 12

36 I didn't see her a long time ago.36.I didn't see her a long time ago

37 How long ago did you learn French?37.How long ago did you learn French?