Everyone is supposeda seat belt in the car. [ ]A. wearing B. to wear C. to be worn D. wears-九年级英语

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• 某生物兴趣小组为了探究蚯蚓生活环境，做了如下实验：将一个长方形的塑料盒用不透水的隔板分为三格，隔板高度为塑料盒的三分之二，在甲中放入土壤并用水淹没土壤，乙中加入疏-七年级生物
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