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题型：听力题 题类：常考题 难易度：普通
北京版小学英语四年级下册Unit 6单元测试（含完整音频）
It's not safe to push. Let's walk slowly.
Sorry. I stepped on your foot.
Look at the thick crowd there.
No, I won't.
Be careful! Don't push in the crowd.
OK, let's be careful.
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