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练习题：
1. In area, the United States is the ____ largest country in the world.
A 2nd B 3rd C 4th D 5th
2.The 50th state in America is ____
A Alaska B Texas C Hawaii D Rhode Island
3. Mauna Loa, the world’s largest active volcano, is located in ____
A Hawaii B Alaska C Texas D Perth
4. Richard Nixon resigned in 1974 because of ____.
A the Great Depression B the Black Power Movement C the Watergate Scandal D the Isolation policy
5.All the following universities are located in New England EXCEPT____
A Yale B Harvard C MIT D Berkeley
6.The United States has less than 6% of the world’s population; yet it produces about ____ of the total world output.
A 20% B 25% C 30% D 35%
7.What forms a natural boundary between Mexico and the United States?
A The Rio Grande River B The southern Rocky Mountains C The Colorado River D The Gulf of California
8. The US formally entered the Second World War in ____
A 1937 B 1939 C 1941 D 1943
9. The Presidents during the American Civil War was .
A Andrew Jackson B Abraham Lincoln C Thomas Jefferson D George Washington
10 The emblem of the Democratic Party is ____.
A elephant B donkey C bear D bull
