什么叫粮油杂质？
参考答案：杂质系指除粮油以外的物质，无食用价值的粮油颗粒和标准中有具体规定的异品种颗粒及绝对筛层筛下物。
They say that _______ a lot of water is good for you.
A．drink
B．having drunk
C．drinking
D．drank
