It’s not important ______ you may call it. What is important is ______ you make good use of it.A.what; whenB.that; howC.what; howD.how; what
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C解析考查名词性从句的连接词。It是形式主语，__________ you may call it是主语从句，且从句缺少call的宾语，所以意what引导，排除B,D；__________ you make good use of it.是表语从句，缺少状语，根据句意，应是：重要的是你怎样利用它。所以选C。