These problems, , will seriously affect the growth of teenagers and even the nation’s future.A．not if solved properly B．if solved properly C．if not solved properly D．not if properly solved 题目和参考答案——青夏教育精英家教网—

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

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

解析试题分析：句意：这些问题如果不能解决，就会严重影响少年的成长甚至说是国家的未来。这里是条件状语从句的省略，完整的是：if these problems are not solved properly,…，当主从句的主语一致的时候，可以省略从句的主语和be动词，所以选C。
考点：考查状语从句的省略

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