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
Rock climbing is hazardous.
A．interesting
B．dangerous
C．attractive
D．useful
单项选择题
Mary looked pale and weary.
A．worried
B．ugly
C．silly
D．exhausted
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