单项选择题

The dentist has decided to extract her bad tooth．

A．take out
B．break off
C．push in
D．dig up
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单项选择题
The economy continued toexhibit signs of decline in September
A．play
B．show
C．send
D．tell
单项选择题
Many people leave their hearing problem untreated．because（）

A．it is not serious．
B．Crystal Ear is not yet available．
C．it is not easy to have it treated．
D．they don’t want to look old．
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