某商品的销售价为225元，利润率为25%，则该商品的进价为（　　）

我国现行的行政区划基本分为省、____、乡三级，其中省级行政单位共有____个．

    “Early to bed, early to rise（起身）makes people healthy, wealthy and wise（健康，富有，聪明）.” This is an old English saying. Children should have ten hours' sleep every night, or （不然，否则）they can't do their work very well. They will not be wise. The body needs exercise. Walking, running, swimming and playing ball games are all exercise. Exercise keeps the body strong.