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题型：单选题 题类：常考题 难易度：普通
牛津版（深圳•广州）2019-2020学年初中英语八年级上册Module 4 Unit 7 Memory 第3课时 Grammar
—All right, Mum.
— No. I think it's difficult _____Bob thinks it's interesting.
— Of course not. He is good at singing ____ he works hard.
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