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第 9 课时
1. Pewter, (a metal) with an (ancient heritage), is still (practical medium) for the (nonprofessional) metalworker.
A
B
C
D
2. (The hardness) (of mineral) often (gives) a clue to (its) identity.
A
B
C
D
3. Canadian scarlet-clad (guards) and mounties (with) horseback are (part) of the (summer scene) in Ottawa.
A
B
C
D
4. Allan Pinkerton, (founder) of (the famous) detective agency that bears (him) name, directed a Civil War espionage system
A
B
C
(behind) Confederate lines.
D
5. Proteins form (the most) of the (structure of) the (body) and also (act as) enzymes.
A
B
C
D
6. (Since beginning) of photography, inventors have (tried) (to make) photographs that duplicate (natural) colors .
A
B
C
D
7. The Yukon River, which (flows) into the Bering Sea, gives (its) name to a region of Alaska (and a) territory (of the)
A
B
C
D
Canada.
8. The diamond (is) the (hardest) (substance) (in the nature).
A
B
C
D
9.(The nitrogen) makes up (over) 78 (percent of) the Earth atmosphere,the gaseous mass (surrounding) the planet.
A
B
C
D
10.(Researchers) at the University of Colorado (are investigating) a series of indicators that (could) help (themselves) to
A
B
C
D
predict earthquakes.
11. The continental divide refers to an imaginary line in the North American Rockies that (divides) (the waters) flowing
A
B
(into) the Atlantic Ocean from (it) flowing into the Pacific.
C
D
12. In 1920 the presidential candidate Warren Harding (coined) the word normalcy to (express) social and (economic)
A
B
C
conditions (they) promised the nation.
D
13. Many critics (believe) that Amy Lwell's most important (work) is not poetry, but (his) biography, John Keats,
A
B
C
(published) the year of her death.
D
14. The (sounds) of jazz are not (similar to) (them) of (traditional orchestra).
A
B
C
D
15. Although (he is) employed in the scientific and (technical) fields, the metric (system) is not generally (utilized) in
A
the United states .
key: CBBCA ADDAD DDCCA
B
C
D