No matter how frequently _____ the works of Beethoven always attract a large number of people.
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A
performing
B
performed
C
to be performed
D
being performed
推荐题目
The engineers made two big plans for the dam, ____ was never put in force. 
#73414
A
one of them
B
which
C
one of which
D
every one of which
The old building, behind _______ was a famous church, was _______ we used to work.
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A
that, the place
B
it, the place
C
which, where
D
what, where