`33. A`

Dựa vào câu đầu: Tet holiday is celebrated on the first day of the Luner New Year.

`34. D`

Dựa vào câu thứ 3: One or two days before the festival, people make Banh chung, which is the traditional cake and kinds of jam. 

`35. A`

Dựa vào câu thứ 4: On the New Year's Eve, the whole family get together for a reunion dinner.

`36. B`

Dựa vào câu 7: And the children recieve lucky money wrapped in red tiny envelopes.

`37. A`

Dựa vào câu 6 và câu 8: On the New Year morning,... Then people go to visit their neighbors, friends and relatives

33. "Tet holiday is celebrated on the first day of the Lunar New Year".

⇒ A. the first day

34."One or two days before the festival, people make Banh chung, which is the traditional cake, and kinds of jam".

⇒ D. Both B and C (B. make kinds of jam ; C. make Banh chung)

35. "On the New Year's Eve, the whole family get together for a reunion dinner".

⇒ A. have a reunion dinner

36. "And children receive lucky money wrapped in red tiny envelopes".

⇒ B. the children

37. "On New Year morning, ... .Then people go to visit their nighbors, friends and relatives".

⇒ A. on New Year morning