单项选择题

By the 1930s, the wolf had vanished from the American West.

A．disappeared
B．arrived
C．left
D．departed
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单项选择题
The dentist has decided to extracther bad tooth.
A．take out
B．repair
C．push in
D．dig
单项选择题
He didn t ignore her intentionally—just didn t recognize her.
A．absolutely
B．deliberately
C．noticeably
D．sufficiently
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