单项选择题

When confronted with these math problems, her mind tended to go ______ and could hardly work any more.

A．blank
B．faint
C．dim
D．vain
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单项选择题
A．predator'sB．squirrel'sC．bird'sD．creature's
A．predator's
B．squirrel's
C．bird's
D．creature's
单项选择题
A．getB．set freeC．rescueD．abandon
A．get
B．set free
C．rescue
D．abandon
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