How milk do you need to pour into the blender?- Two glasses of, please. A. many B.

--- How milk do you need to pour into the blender? --- Two glasses of, please.
A. many B. much C. about often

解析：HOW和四个选项搭配分别表示多少个,多少(修饰不可数名词)、……怎么样和多久一次，根据题意，你需要多少牛奶，牛奶为不可数名词，可知选B，

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