One advantage of eating a balanced breakfast is ______ it can keep you energetic throughout the day.A.whenB.howC.thatD.whether
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C解析试题分析:考查从句,从句it can keep you energetic throughout the day不缺少成份,when表示时间,既起连接作用,又有具体意思;how表示怎么,既起连接作用,又有具体意思;that只起连接作用,没有任何意义;whether表示是否,既起连接作用,又有具体意思;所以选C考点:考查从句
点评:做从句题时,首先看从句是否缺少成份,如果缺少就在关系代词里找引导词;如果不缺少成份,就在关系副词里选择引导词