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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If you spare half an hour each day to read an English newspaper, you will surely be able to read______.
A. efficiently
B. sufficiently
C. actually
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However much ______ , it will be worth the price.
A. does the watch cost
B. costs the watch
C. the watch will cost
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