单项选择题

Jenny didn't have time to go to concert last night because she was busy ______ for her examination.

A. preparing
B. to be prepared
C. to prepare
D. being prepared
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单项选择题
Have you ever seen a ______ bag on the table
A. plastic small black
B. black small plastic
C. plastic black small
D. small black plastic
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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