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