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···

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···
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···

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···
how much 因为不可数名词可以用a piece of,a bottle of ,a bowl of等修饰

应该是
how much
因为这里的paper毕竟不可数

当然是HOW MUCH啊。
因为HOW MUCH就是对不可数的名词提问的。

how much