two glasses of milk 这里为什么加of

two glasses of milk 这里为什么加of two glasses of milk的意思 There ____ two glasses of milk on the table.为什么不能填is?milk是不可 She wants two glasses of milk.(对two glasses of milk提问)____ _ 为什么是two glasses of milk复数形式不是眼镜吗?不是应该用glass吗? Two glasses of milk be动词用is还是are Mary drinks two glasses of milk every day对two glasses提问 please give two glasses of milk和please a glass of milk哪个对 ___ of the glasses is full of milk;two of them are full of c two glasses of orange 对划线部分提问we need two glasses of milk two划线 four glass of milk 还是four glasses of milk