V. Mark the letter A, 8, C, or D to indicate the correct answer to each of the following questions. (GIẢI THÍCH NẾU ĐƯỢC) 10. While I _ for him to call up, he_________ a good time in the bar. A. waited — was having B. was waiting — was having C. was waiting — had D. was waited — was waiting 11. All the kids ___ their homework when the volunteer team__________ A. were doing — arrived B. did — arrived C. were doing — were arriving D. did — were arriving 12. While Lauda_____ round a corner, he suddenly__________ control of his Ferrari. A. went — lost B. was going — was losing C. was going — lost D. went — was losing 13. While the Cambridge boat_______ under a bridge, it _______ another boat. A. went — was hitting B. went — hit C. was going — was hitting D. was going — hit 14. My cousin and I ____ on the computer when there__________ a power cut. A. played — was B. were playing — was C. played — were D. were playing — were 15. When I_______ my best friend, she __________ as a voluntary teacher in Dream Homeless Shelter. A. met — was working B. was meeting — was working C. met — worked D. was meeting — worked ect answer to each of the following questions.