31 enthusiastic
32 experienced
33 celebrities
34 embarrassment
35 suspiciously
36. By the time Tom arrived at the party, most of the guests had left.
37. Sue is made to wash her hands before meals by her parents (câu này đề sai vì cấu trúc chủ động của make là make sb + V, cấu trúc bị động là be made to V)
38. When we were having lunch, there was a knock at the door.
39. She can't get used to being criticized by people around.
40. The detective happened to discover the secret.