单项选择题

（）is prohibited near gasoline.

A．No smoking
B．Smoking
C．Working with electric power tools
D．A wet extension cord

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单项选择题
We should（）before starting lawn and garden work somewhere.

A．walk around the area
B．remove any objects that could damage equipment
C．wear hearing protection
D．Both A and B.
单项选择题
We can never work with electric power tools in（）conditions.

A．wet
B．any
C．hot
D．cold
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