单项选择题

In the United States educational system, intermediate school is the transitional phase between the primary grades and high school.

A．stage
B．notion
C．pattern
D．alternative
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She is very conscientious about her work.
A．worried
B．careful
C．anxious
D．nervous
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Unfortunately war started suddenly in the Middle East on October 6, 1973.
A．broke out
B．broke off
C．broke through
D．broke away
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