单项选择题

No matter how frequently ______, the works of Beethoven always attract large audiences.

A. performed
B. performing
C. to be performed
D. being performed
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单项选择题
New books were displayed in a ______ position on tables at the front of the shop.
A. prominent
B. distinguished
C. well-known
D. outstanding
单项选择题
Human behavior is mostly a product of learning, whereas the behavior of an animal depends mainly on ______.
A. consciousness
B. impulse
C. instinct
D. response
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