单项选择题


A．when
B．until
C．unless
D．before
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单项选择题
How many of the passengers have been injured in the train accident
A．30.
B．90.
C．120.
D．6.
单项选择题
The train derailed somewhere 10 miles near
A．Chicago.
B．Washington.
C．New York.
D．an unknown destination.
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