单项选择题

The product appeared to be adequate in every respect.

A．improper
B．sufficient
C．superior
D．poor
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单项选择题
A conscientious teacher spends hours preparing for classes and correcting students' paper.
A．creative
B．leading
C．skillful
D．careful
单项选择题
The principal congratulated the student on his outstanding display of leadership.
A．alluded
B．scolded
C．praised
D．contacted
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