They need_three bags of_salt.(对划线部分提问) _____ _____salt do they need.
问题描述：
They need_three bags of_salt.(对划线部分提问) _____ _____salt do they need.
这里的空应该是填how much吧,因为提问部分是不可数,要how many 必须是这样吧How many bags of salt do they need?
答
对的
How much 是对salt 提问,因为salt不可数
How many 是对bag提问,bag可数,修饰salt