单项选择题

He found Irene ______ at the piano with her hands on the keys.

A．seating
B．seated
C．seat
D．to seat
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单项选择题
The members in the testing team were quite ______ and could change their schedule upon request.
A．lenient
B．supple
C．flexible
D．gentle
单项选择题
In general, matters which lie entirely within state borders are the ______ concern of state governments.
A．extinct
B．excluding
C．excessive
D．exclusive
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