16. C
17. A
18. B
19. C
20. A
1. 细节题。由第二段第五六句 “At first, "whitewash" meant to paint something with white paint to make it look better. However, it means something different today: to hide or to cover up mistakes or failures.” 可知C是正确答案。2. 细节题。由第一段 “A white-collar job, for example,is the kind of job many people look for, working with your brain and not your hands.” 可知C不正确，而B和D完全与题干无关。所以选A。3. 细节题。由第二段 “... but it was very expensive to keep. The kings of those days gave a white elephant to the people they wanted to ruin(毁掉). ” 可知选B。4. 由 “Today, a "white elephant" means something that is big, useless, and unwanted. ” 可知，“不被人们喜欢的电影院”可以被称作 “a white elephant“，选C。5. 主旨题。结合文意可知，文章分别讲述了 ”white“ 在不同情况下的不同含义，所以选A。
