The boy drinks milk once a day.(once加下划线)对划线部分提问 题目不完整,请看补充The boy drinks milk once a day.(once加下划线)对划线部分提问（ ）（ ）（ ）does the boy drink milk a day.
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The boy drinks milk once a day.(once加下划线)对划线部分提问 题目不完整,请看补充
The boy drinks milk once a day.(once加下划线)对划线部分提问（ ）（ ）（ ）does the boy drink milk a day.
How many times