单项选择题

America's most important food crop is ______.

A．wheat
B．rice
C．corn
D．oats
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单项选择题
According to the passage, Wineland was characterized by which of the following geographical features
A．Woods only.
B．Hills only.
C．Woods and hills only.
D．Flat rocks and hills only.
单项选择题
Which of the following would LEAST likely have been the subject of an early American textbook
A．Basic rules of English grammar.
B．The American Revolution.
C．Patriotism and other civic virtues.
D．Vocational education.
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