单项选择题

The five-year survey in Sweden revealed ______ of unnatural deaths were associated with alcohol.

A．29%
B．44%
C．almost 50%
D．56%
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单项选择题
How long will the sucking of the mosquito last
A．Less than 8 seconds.
B．No more than 12 seconds.
C．Eight to 10 seconds.[C] About 5 seconds.
单项选择题
All of the following are causes of being bitten by mosquitoes EXCEPT ______.
A．carbon dioxide and other odors
B．sweat
C．the quality of your skin
D．heart and blood pressure medicine
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