单项选择题

Jack is a diligent student.

A．hardworking
B．ambitious
C．lazy
D．slow
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单项选择题
The attack on Fort Sumter near Charleston provoked a sharp response from the North, which led to the American Civil War.
A．demanded
B．elicited
C．extracted
D．defied
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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