单项选择题

Silk, although it is considered a delicate fabric, is in fact very strong, but it is adversely affected by sunlight.

A．soft
B．sheer
C．fragile
D．refined
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单项选择题
The nasty language of local officials makes them seem very ignorant and rude.
A．artificial
B．indecent
C．humorous
D．lively
单项选择题
The sitting-room feels comfortable with the fireplace shedding warm and faint light.
A．giving off
B．calling off
C．shaking off
D．putting off
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