As a senior high student, you should your energy on how to master the skills of learning.A.impressB.spendC.concentrateD.use
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C解析试题分析：词的用法。Concentrate ...on ,集中...于spend time/money on sth/in doing sth 花时间/金钱做某事. Impress 给...印象句意：作为一个高中生，你应该把你的精力集中在怎样掌握学习的技能上。故选C考点：词的用法。点评：注意与介词的搭配。补充：fix/focus/concentrate....on, attract/catch one’s attention to