Ex VII: 

33. Despite being born in a poor family, he became one of the world's wealthiest people

34. Khiem suggested that those clothes be given to homeless people

35. If I were Quang, I would study hard for the upcoming exam

36. The river in which he children prefer to swim in is clean

VIII: 

33. If the car weren't expensive, we would buy it

34. In spite of the heavy traffic, they got there in time

35. The movie which the kids were watching is interesting

36. Taking care of these orphans is Miss Hoa's resposibility.

33. Although he was born in a poor family, he became one of the world's wealthiest people.

> Despite being born in a poor family, he became one of the world's wealthiest people.

34. "Why don't we give these clothes to homeless people?" said Khiem.

> Khiem suggested that those clothes should be given to homeless people.

35. My advice is that Quang should study hard for the upcoming exam.

If I were Quang, I would study hard for the upcoming exam.

36. The river that the children prefer to swim in is clean.

>The river in which the children prefer to swim is clean.

`VIII. `

33. We can't buy that car because it is too expensive.

- If that car wasn't expensive, we could buy it.

34. They got there in time although the traffic was heavy.

- In spite of the heavy traffic, they got there in time.

35. The kids were watching an interesting movie.

The movie which the kids were watching, was interesting.

36. Miss Hoa is responsible for looking after these orphans.

Taking care of these orphans is Miss Hoa's resposibility.