单项选择题

Please be careful when you are drinking coffee in case you smudge the new carpet.

A．crash
B．pollute
C．spot
D．stain
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The economy continued to exhibit signs of decline in September.
A．play
B．show
C．send
D．tell
单项选择题
She is slender, with delicate wrists and ankles.
A．sick
B．weak
C．slim
D．pale
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