单项选择题

Ann（）the piano hard for long and now she is a successful pianist.

A．practices
B．is practicing
C．has practiced
D．practiced

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单项选择题
Although（）my opinion, Pro. Wang didn't come up with his own。

A．against
B．on
C．for
D．in
单项选择题
（）that she didn't do a good job, I don't think I am abler than her.

A．To have said
B．Having said
C．To say
D．Saying
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