单项选择题

They ______ TV for two hours.

A．had watched
B．are watching
C．watched
D．have been watching
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单项选择题
No matter how frequently, the works of Beethoven (贝多芬)always attract large audience.
A．performing
B．performed
C．to be performed
D．being performed
单项选择题
Could you tell us something about ______ time of your summer holidays
A．the happier
B．happy
C．happier
D．the happiest
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