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As a senior high student, you should   your energy on how to master the skills of learning.
A.impressB.spendC.concentrateD.use
C

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
点评:注意与介词的搭配。补充:fix/focus/concentrate....on, attract/catch one’s attention to
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