Exercise 1: Chia dạng đúng của động từ trong ngoặc 1. When I (come)........................, she was cleaning the door. 2. When I (come)........................, she will be cleaning the door. 3. When he went home, his mother (cook)........................dinner, so he took off his coat to help her. 4. When he went home, he (cook)........................because his wife were busy. 5. When I was young, I (harbor)........................the dream of a famous doctor. 6. When he grew up, he (join)........................the army. 7. When I saw him, I (remind)........................him to call you. Exercise 2: Chọn phương án đúng 1. I your brother at Green Street yesterday afternoon. A. meet B. met C. have met D. had met 2. He a cigarette and to the window. A. light; walked B. lit; walks C. lighted; walked D. lights; walks 3. I can't go with you because I my homework yet. A. haven't finished B. had finished C. finished D. finish 4. He for London 2 years ago and since then I him. A. have left; didn't see B. left; haven't seen C. eft; hadn't seen D. had left; have't seen 5. The performance at 7 o'clock and for 3 hours. We all it very much. A. had started; had lasted; enjoyed B. had started; lasted; enjoyed C. started; had lasted; enjoyed D. started; lasted; enjoyed 6. I from him since he two years ago. A. hadn't heard; disappeared B. haven't heard; disappeared C. didn't hear; has disappeared D. will not hear; disappears 7. Who you to the cinema with last night? A. went B. did you go C. had gone D. did you went 8. Detective: I'm afraid I must ask both of you. What at 10.20 p.m yesterday? Mr. X: I chess with my wife. Mr. Y: I to a play on the radio. A. were you doing; am playing; was listening B. did you do; played; listened C. were you doing; am playing; am listening D. were you doing; was playing; was listening 9. You my sister for a long time come to see us tonight? A. haven’t seen; Will you B. won't see; Will you C. hadn't seen; Would you D. haven’t seen; Are you going