Chia dạng đúng của từ trong ngoặc

go to
each yesterday
34. It was a lovely day. The sun was shining and the birds
35. The tourist lost his camera while he
36. The lorry
37.1
38. At this time last year, I
39. Jim
40. While I
41. Mary and I
(sing) in the trees.
(walk) around the city.
(go) very fast when it hit our car.
(walk) down the street when it began to rain.
(attend) an English course.
(stand) under the tree when he heard
(study) in my room, my roommates
an explosion.
(have) a party in the other room.
(dance) the house when the telephone rang.