单项选择题

A lot of people could fall ill after drinking contaminated water.

A．boiled
B．polluted
C．mixed
D．sweetened
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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
The girl is gazing at herself in the mirror.
A．smiling
B．laughing
C．shouting
D．staring
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