单项选择题

A．There are no rapids or waterfalls.
B．There is a constant, strong wind.
C．Navigation is rather difficult.
D．Frequent storms cause problems for riverboats.
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单项选择题
A．He took the place of a president who resigned his position.B．He had worked for 38 years in Washington DC till 1930.C．He never lost the speech or manners of his hometown.D．He kept two dogs in his ranch in Johnson City, Texas.
A．He took the place of a president who resigned his position.
B．He had worked for 38 years in Washington DC till 1930.
C．He never lost the speech or manners of his hometown.
D．He kept two dogs in his ranch in Johnson City, Texas.
单项选择题
The fundamental flaw of American school education is that________.
A．it lacks a coordinated national program
B．it sets a very low academic standard for students
C．it relies heavily on the initiative of individual teachers
D．it attaches too much importance to intensive study of school subjects
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