These problems, ________, will seriously affect the growth of teenagers and even the nation’s future.
A．not if solved properlyB．if solved properly
C．if not solved properlyD．not if properly solved
C

試題分析：句意：這些問(wèn)題如果不能解決，就會(huì)嚴(yán)重影響少年的成長(zhǎng)甚至說(shuō)是國(guó)家的未來(lái)。這里是條件狀語(yǔ)從句的省略，完整的是：if these problems are not solved properly,…，當(dāng)主從句的主語(yǔ)一致的時(shí)候，可以省略從句的主語(yǔ)和be動(dòng)詞，所以選C。
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