单项选择题

Teachers of young children should scrupulously avoid ridicule and sarcasm.

A．theoretically
B．naively
C．diligently
D．confidently
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单项选择题
The night was so ______ that not a sound could be heard.
A．quiet
B．beautiful
C．dark
D．dangerous
单项选择题
A Laser beam can be turned into a ______ weapon.
A．deadly
B．dead
C．deadthly
D．deadening
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