单项选择题

The author wants to tell us that America ______.

A．is experiencing a crisis of nationhood
B．is trying to restrict the Bill of Right
C．has ended its history of racial prejudice
D．has tried to obstruct intellectual freedom

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热门试题

单项选择题

According to Schlesinger, the United States is ______.

A．a melting pot
B．a nation with diverse cultures held together by the democratic process
C．a federation of ethnic and racial communities
D．a nation with various ethnic and racial groups

单项选择题

The horizons of science have expanded means that ______.

A．the horizon changes its size from year to year
B．science has developed more fields of endeavor
C．scientists have made great progress in studying the horizon
D．scientists can see further out into space