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题型：单选题 题类：常考题 难易度：容易
初中英语冀教版七年级下册Unit 1 Lesson 6 Jenny's Diary 同步练习B卷
—Sorry, I don't have a _______.
—Sure. You could communicate with them better.
— They're for public. This ______________ of green smart traffic is everywhere in Xiangyang City.
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