16. Care should be taken to decrease the length of time that one is _____ loud continuous noise.
A. subjected to
B. filled with
C. associated with
D. attached to
17. Careful surveys have indicated that as many as 10 percent of patients do not take drugs ______ directed.
A. like
B. so
C. which
D. as
18. Changing from solid to liquid, water takes in heat from all substances near it, and this ______ produces artificial cold surrounding it.
A. absorption
B. transition
C. consumption
D. interaction
19. Charles can't go to work today because he _____ a cold.
A. has
B. feels
C. takes
D. thinks
20. Charles has not the least ______ of giving up his research.
A. intention
B. decision
C. idea
D. hope
参考答案：
1. B 2. B 3. A 4. A 5. C 6. B 7. C 8. A 9. B 10. B
11. C 12. D 13. D 14. A 15. B 16. A 17. D 18. A 19. A 20. A