题目内容

is the largest single source of imports for the U.S..()

A. Brazil
B. Canada
C. Britain
D. China

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Most Americans are () from different countries.

A. blacks
B. Indians
C. emigrants
D. immigrants

The college sport which stirs up the most national interest in the United States is ().

A. Football
Baseball
C. Basketball
D. Soccer

Which of the following does not belong to the three principal functions of U.S. higher education().

A. Teaching.
B. Research.
C. Public service.
D. Social charity.

The U.S. ranks () in the export of rice in the world.

A. first
B. second
C. third
D. fourth