(急）6道英语选择题,要详细解释

(急）6道英语选择题,要详细解释
6. ______you __________ the film before ? Where _____ you ____ it ?
A. Have …seen…did…see B. Did …see…did…watch
C. Have…seen…have…seenD. Did …see…have…seen
8.Where ______ John _______ ? To the library. He _________ there for an hour.
A. has…been…has gone B. has…gone…has been C. did…go…went D. did…be…went
9.______ the baby still _____ ? No, it _______ crying.
A. Has…cried…has stoppedB. Is…crying…stoppedC. Did …cry…stoppedD. Is…crying…has stopped
12. My brother ____college for over three years.
A. has gone to B. has been to C. has been in D. has been at
14. By the time I _____ back they ____up ten satellites.
A. came…have sentB. came…had sent C. come…have sentD. had come…sent
15. Jack ____ over five lessons by seven o’clock. Then he ____ a rest.
A. went…tookB. went…had takenC. had gone…took D. had gone…had taken
答案：A A D D B C