单项选择题

No matter how frequently ______, the works of Beethoven still attract people all over the world.

A．performed
B．performing
C．to be performed
D．being performed
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单项选择题
—We ve spent too much money recently.—Well, it isn t surprising. Our friends and relatives ______ around all the time.
A．are coming
B．had come
C．were coming
D．have been coming
单项选择题
He sent me an e-mail, ______ to get further information.

A．hoped
B．hoping
C．to hope
D．hope
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