15. A. shout B. could C. house D. down
16. A. happen B. family C. father D. rapid
17. A. dream B. teacher C. stream D. bread
18. A. drunk B. drug C. fruit D. unhappy
19. A. changes B. causes C. noises D. makes
20. A. smile B. finish C. kitchen D. miss
15. B
16. C
17. D
18. C
19. D
20. A
1 B
2 C
3 D
4 C
5 D
6 A