单项选择题

Which of the following is NOT mentioned as a factor that contributes to great fire danger（）

A．Sultry weather.
B．Cigarettes thrown out of car windows.
C．Pine forests.
D．Windstorm.

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填空题
A. season B. neat C. reason D. measure
单项选择题
When he opened the tin, it（）a bad smell.

A. gave away
B. gave in
C. gave up
D. gave off
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