V.

31. Your writing is too difficult for everyone to read.

→ S + Vbe + too + Adj + (for +O) + to_V

32. It's very important to keep the environment.

→ S + Vbe + Adj + to_V

33. History has been taught in our school by Mrs.Trang for over ten years.

→ câu bị động thì HTHT: S + have/has + been + V3/ed + by + O

34. Minh does morning exercises regularly in order to be healthy.

→ S + V + in order (not) to + V…: ... để mà ...

35. She asked her son if he could answer the phone for her.

→ S + asked + O + if/wheter + S + V(lùi thì) ( lùi từ 'can' → 'could' )

VI.

36. D ( to play → playing )

→ spend + time + V_ing: dành thời gian để làm gì

37. A ( forget → forgetting )

→ diễn tả 1 thói quen xấu ta dùng HTTD: S + is/am/are + always + V_ing

38. D ( used to singing → used to sing )

→ used to + V0: đã từng làm gì ( trong quá khứ )

39. C ( get → to get )

40. B ( already → yet )

@ $Âu$

`~rai~`

\(\text{31.Your writing is too difficult  for everyone to read.}\\\text{32.It's very important to keep the environment clean.}\\\text{33.History has been taught in our school by Mrs.Trang for over ten years.}\\\text{34.Minh does morning exercises regularly in order to be healthy.}\\\text{35.She asked her son if he could answer the phone for her.}\\\text{36.D->playing(spend+thời gian+V-ing)}\\\text{37.A->forgetting(be+always+V-ing:diễn tả sự phàn nàn)}\\\text{38.D->used to sing(used to+V-inf)}\\\text{39.C->to get(từ để hỏi+to V-inf)}\\\text{40.B->yet}\)

$# Băng Cướp Cầu Vồng.$