Supply the correct form of the verbs in the brackets
GIẢI THÍCH RÕ RÀNG
I. Supply the correct form of the verbs in the brackets:
31. When he arrived at the station, his train already _________________. (leave)
32. I bought this mobile phone a month ago, and now it _________________. (not work)
33. While I was watching TV last night, a mouse _________________across the floor. (run)
34. The little girl started to cry. She _________________ her doll, and no one was able tfind it for her. (lose)
35. I suddenly remembered that I _________________ my keys. (forget)