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题型：单选题 题类：常考题 难易度：容易
牛津版（深圳•广州）2017-2018学年初中英语七年级下册Module 3 Natural elements Unit 6 Electricity 综合复习
—You can switch off some lights.
— Sounds you are having fun.
—Thank you， Steve. I only _____ it as a good _______ to improve myself in many ways.
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