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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）初中英语九年级下册Module 2 Environmental problems Unit 4 Natural disasters 第5课时同步习题
—Yes. He didn't ________ us since he was 18 years old.
— Many people regard them as sisters when they hang out together.
—I will. He has to know it's dangerous.
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