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
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单项选择题
The principal congratulated the student on his outstanding display of leadership.
A．alluded
B．scolded
C．praised
D．contacted
单项选择题
He was confronted with many difficulties, which, with the help of his friends, he successfully overcame.
A．was opposed by
B．was faced with
C．was happy with
D．was caused by
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