单项选择题

According to the prescription, how many times does Sam have to take the medicine in a week altogether

A．Four times.
B．Forty-two times.
C．Twenty-four times.
D．Twenty-eight times.
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单项选择题
The train derailed somewhere 10 miles near¬¬______.
A．Chicago
B．Washington
C．New York
D．an unknown destination
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.
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