单项选择题

When you become frightened, many physical changes occur within your body.Your heartbeat and responses quicken; your pupils dilate (扩大) and ______ more light.

A．permit
B．allow
C．admit
D．let
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单项选择题
The real trouble ______ their lack of confidence in their abilities.
A．lies in
B．lies on
C．results in
D．leads to
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______ you've got a chance, you might as well make full use of it.
A．Now that
B．After
C．In that
D．As soon as
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