单项选择题

Gas does accumulate in the mines around here.

A．increase
B．spread
C．collect
D．grow
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单项选择题
Unfortunately, the rate of his expenditure surpasses that of his income.
A．precedes
B．dominates
C．exceeds
D．prevails
单项选择题
The dentist has decided to take out the girl's bad tooth.
A．dig
B．draw
C．pull
D．extract
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