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

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

C



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。

不明白啊 = =！