单项选择题

The dentist has decided to extract her bad tooth.（）

A．take out
B．repair
C．push in
D．dig

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单项选择题
A lot of people could fall ill after drinking contaminated water.（）

A．muddied
B．polluted
C．mixed
D．troubled
单项选择题
The economy continued to exhibit signs of decline in September.（）

A．play
B．send
C．show
D．tell
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