6. My mother __________ every morning.A. is cooking B. cooked C. cooks D. was cooking 7. I ________Romeo and Juliet several times.A. read B. was reading C. have read D. had read 9. Mary ________ with her friends in an apartment in Hanoi since last month.A. is living B. has lived C. lived D. lives 10. He's her closest friend. He _____her since they were children.A. knew B. knows C. has known D. known 15. Peter ______at the moment, so he can’t answer the telephone.A. is working B. working C. has worked D. works 18. The children always ___________ to bed at eight o’clock.A. go B. goes C. went D. is going 19. They _________ their car two years ago.A. bought B. has bought C. buy D. had bought 20. I ____________ my sister in Germany in next year.A. visited B. visit C. was visiting D. will visit