问题
选择题
As a senior high student, you should your energy on how to master the skills of learning.
A．impress
B．spend
C．concentrate
D．use
答案
答案：C
题目分析：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