试题 试卷
题型：单选题 题类：常考题 难易度：普通
牛津版（深圳·广州）2018-2019学年初中英语七年级下册Module 3 Unit 5自主检测
— The river can provide us with a lot of fresh water.
—Yes, it's interesting, _____difficult.
—I once tried, but failed.
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