There is a knife in my pencil-box.对划线部分提问
问题描述：
There is a knife in my pencil-box.对划线部分提问
There is a knife in my pencil-box.划线部分为a.
答
How many knives are there in your pencil-box
注：问数量用HOW MANY‘多少’ ,后接可数名词的复数.
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