20. The new school was set up _________ there had once been an old temple.

　　 A. where　　　　　 B. that　　　　　　　 C. which　　　　 D. when

19. -I meant ________ you to the host at the party, but I forgot.

　　　 -That’s all right. Some other time, maybe.

　　 A. to introducing　　 B. to introduce　　　 C. introducing　　 D. having introduced

18. -Everyone was at the party except you. What happened?

　　　 -I ________ with a friend who had traveled all the way from New Orleans.

　　 A. talked　　　　　 B. was talking　　　 C. had talked　　 D. have been talking