单项选择题

（）was the top preventable contributing factor to the deaths.

A．Being underweight
B．Physical inactivity
C．Cigarette smoking
D．High blood pressure

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According to the writer, the top killers in China are（）

A．stroke
B．cancer
C．heart disease
D．All of the above.
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Your hair needs（）You'd better have it cut tomorrow.

A．Cutting
B．to cut
C．cut
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