一道英语单项选择,麻烦解释下为什么选,还有其他的选项为甚不行__________into oceans and rivers is a serious form of pollution.A.Pouring sewageB.Empty litterC.Throwing garbageD.Dumping sewage
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![一道英语单项选择,麻烦解释下为什么选,还有其他的选项为甚不行__________into oceans and rivers is a serious form of pollution.A.Pouring sewageB.Empty litterC.Throwing garbageD.Dumping sewage](/uploads/image/z/3737549-29-9.jpg?t=%E4%B8%80%E9%81%93%E8%8B%B1%E8%AF%AD%E5%8D%95%E9%A1%B9%E9%80%89%E6%8B%A9%2C%E9%BA%BB%E7%83%A6%E8%A7%A3%E9%87%8A%E4%B8%8B%E4%B8%BA%E4%BB%80%E4%B9%88%E9%80%89%2C%E8%BF%98%E6%9C%89%E5%85%B6%E4%BB%96%E7%9A%84%E9%80%89%E9%A1%B9%E4%B8%BA%E7%94%9A%E4%B8%8D%E8%A1%8C__________into+oceans+and+rivers+is+a+serious+form+of+pollution.A.Pouring+sewageB.Empty+litterC.Throwing+garbageD.Dumping+sewage)
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