Question 33: Hoa said that her brother had gone to the dentist the previous day. (went to)

=> Hoa said: " My brother went to the dentist yesterday. "

Question 34: Earthquakes and volcanoes have caused most of the natural disasters. (have been caused)

=> Most of the natural disasters have been caused by earthquakes and volcanoes.

Question 35: I'm going to attend a summer camp next week. (I plan)

=> I plan to attend a summer camp next week.

Question 36: He came to my house at 9 a.m. I went out for shopping at 8.30 a.m. (had gone)

=> Before he came to my house at 9 a.m, I had gone out for shopping at 8.30 a.m.

Question 37: I can't come to your party because I have to work overtime.

=> If I didn't have to work overtime, I could come to your party.

Question 38: Nobody has used this room for years.

=> This room has not been used for years.

Question 39: "I will hand in my essay to the teacher tomorrow."

=> She said that she would hand in her essay to the teacher the following day.

Question 40: The streets and the houses were flooded because it rained heavily.

=> Due to the heavy rain, the streets and the houses were flooded.

$_Xin hay nhất_$

33.Hoa said that''my brother went to the dentist yesterday.''

34.Most of the natural disaster have been caused earthquakes and volcanoes.

35.I plan to attend a summer camp next week.

36.Before he came to my house at 9pm,I have gone out for shopping at 8.30pm

37.If I didn't have to work overtime,I could come to your party.

38.This room hasn't been  used for years.

39. She said that she would hand in her essay to the teacher the following day.

40.Due to the heavy rain,the streets and the houses were flooded.