—Please remember _________water pipe when you don’t need water. —OK, I will.
—I lost my watch on my way to school this morning. — You must be careful next time.
Xi’an is ancient county with long history.
I am not hungry because I have __ __ had lunch.
— you ever to Beijing before? —No, never.
His talk was nothing but milk and water. “milk and water” here means________.