单项选择题

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

A．performing
B．performed
C．to be performed
D．being performed

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单项选择题
Mr. Smith will never forget the days（）he spent with his family in those cities of Italy.

A．when
B．which
C．during
D．on which
单项选择题
According to the newspaper, more than one worker（）dismissed in this economic depression.

A．have been
B．are
C．has been
D．has
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