36.She has made those posters 3 hours ago . 

37. We began working in that factory in 2000 .

Cấu trúc của câu 36,37 : S + started/began + V-ing/to V + in/on/when 

-> S + has/have + Vpp  + since / for

38 . How about turning off the lights before going out ? 

Cấu trúc : Why don't + S + V(bare ) 

-> How about + V-ing 

39.I find reading newspaper in the morning pleasure . 

Cấu trúc  : I + think + ( that ) + something/doing something + is + tính từ

-> S + find + something/doing something + tính từ 

40. The cupboard has fifty-six bottles . 

Cấu trúc : there is /are + danh từ đếm đc/ ko đếm đc 

-> S + has / have + số lượng + danh từ đếm đc / ko đếm đc .

41. Because the camera doesn't work , so Jimm take it back the shop .

36. She has made those posters for 3 hours.

(S+began/started+V-ing/to V+time+ago ⇔ S+ has/have+pp+for+time) 

37. We began working in that factory in 2000.

38. How about turning off the lights before going out??

39. I find reading newspaper in the morning pleasure.

(S+find+doing sth+adj ⇔ S+think+doing sth+(be)+adj)

40. The cupboard has fifty-six bottles.

40. Because the camera didn't work, Jim took it back the shop.

(Clause 1, so + clause 2 ⇔ Because + clause 1, clause 2)