16. The library is ____ the dining hall and the gym.

   A. between            B. in               C. on                D. over

17. Your best friend doesn’t give up when he has problems, _____ he?

   A. doesn’t             B. does             C. is                 D. isn’t

18. It’s very kind ____ you to lend me your bike.

   A. for                 B. with             C. to                 D. of

19. What ___ you ___ at three o’clock yesterday afternoon?

   A. were; doing          B. have; done       C. do; do              D. are; doing