These problems, __________, will seriously affect the growth of teenagers and ev

题干

These problems, __________, will seriously affect the growth of teenagers and even the nation’s future.

A．solved properly	B．if solved properly
C．not if properly solved	D．if not solved properly

上一题下一题 0.4难度单项选择更新时间:2011-11-24 07:01:45

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