11. A. collect B. clean C. city D. cracker
12. A. pottery B. melody C. modal D. profit
13. A. near B. clear C. dear D. learn
14. A. knocked B. needed C. founded D. wanted
15. A. spring B. swimming C. think D. realize
16. A. country B. hungry C. fly D. every
17. A. why B. who C. when D. what
18. A. finished B. reported C. landed D. succeeded
19. A. celebrate B. lazy C. vacation D. mechanic
20. A. conclusion B. ensure C. rush D. mission
c b d a d c b b d c
11.c
12.b 13.d 14.a 15.d 16.c 17.b 18.b 19.d 20.c