You should exercise more so as to keepenergetic．题目和参考答案——青夏教育精英家教网—

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13．You should exercise more so as to keepenergetic（精力充沛）．

分析为了保持精力充沛你应该多锻炼．

解答答案：energetic
根据句意keep 后需接一个形容词形式，即energetic．keep energetic为固定短语意思是保持精力充沛．

点评本题考查了单词拼写．做本题时，需要结合题干中给出的汉语意思，然后从语法分析的角度去判断句中所填单词的形式；另外，还应在平时的学习中，熟练掌握所学到的词汇，准确把握一些词的词类转换

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