单项选择题

Everything is changing rapidly and ______ all recognition.

A. off
B. over
C. within
D. beyond
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单项选择题
Clothing made of plastic fibers has certain advantages over ______ made of natural fibers like cotton, wool, or silk.
A. one
B. the one
C. that
D. what
单项选择题
To be successful, a business needs to be aware of its ___________ and weakness as com- pared with its opponents.
A. virtue
B. merit
C. strength
D. advantage
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