16. There was a caption underneath the photograph.

　　[A] signature [B] graph [C] title [D] design

　　17. The answer lay in a resource that unknowing Americans had trampled underfoot in their haste to cross the “Great American Desert” to reach lands that sometimes proved barren.

　　[A] lonely [B] dangerous [C] uncomfortable [D] infertile

　　18. Huey Long' s denunciations of the federal government were often inspired by the fervor of his listeners.

　　[A] size [B] curiosity [C] cheerfulness [D] zeal

　　19. Hailed as the “Queen of Soul”, Aretha Frankilin imparts a gospel sound to most of her music.

　　[A] Inaugurated [B] Categorized [C] Acclaimed [D] Promoted

　　20. With laser scientists can probe many physical processes, such as combustion, once beyond our ken.

　　[A] understanding [B] responsibility [C] interpretation [D] notice

　　Keys: 16-20 CDDCA