When ______ by the teachers, a student tends to study harder than usual.A．to be_刷题宝

题干

When ______ by the teachers, a student tends to study harder than usual.

A．to be praised

B．praising

C．praised

D．to praise

上一题下一题 0.85难度单项选择更新时间:2011-12-05 03:00:17

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