那个there is a piece of paper on the desk.对a piece of 提问 是用how many 还是用how much 也.
问题描述：
那个there is a piece of paper on the desk.对a piece of 提问 是用how many 还是用how much 也.
paper是不可数 如果换成______ _____ paper do you need?a piece,please.空的地方时选how many 还是 how much .有点忙然···
答
how much 因为不可数名词可以用a piece of,a bottle of ,a bowl of等修饰