=>

33. Lan wanted to know what they were doing.

-> câu tường thuật dạng Wh questions : asked sb/wanted to know + từ để hỏi + S V(lùi thì, HTTD -> QKTD)

34. Peter wondered what to wear to the fancy dress party.

-> wh word to V ~ wh word S should V

35. This is the worst hotel (that) we've ever stayed at.

-> so sánh nhất của bad là worst

36. I think Ho Chi Minh is more exciting than Da Nang.

-> so sánh hơn tính từ dài more adj than

Part 7.a.

1. Lan wanted to know where they were doing.

Cấu trúc câu gián tiếp với Wh-question : S+ asked + O+ Wh-question + S+ V(lùi thì )

2. Peter wondered what he should wear to the fancy dress party.

Cấu trúc câu gián tiếp với Wh-question : S+ asked + O+ Wh-question + S+ V(lùi thì )

b.

1. This is the worst hotel we’ve ever stayed at.

- Dùng so sánh nhất với tính từ ngắn : S1+ tobe+ the + ADJ- est+ than+ S2

2. more exciting 

Cấu trúc so sánh hơn với tính từ dài : S1+ tobe+ more + ADJ/ADV + than+ S2