我国历史上第一个统一的多民族的中央集权国家是（  ）

下列词语中加横线的字的注音字形全部正确的一项是（    ）

早、午、晚三餐摄入热量的最佳比值是（   ）

    My name is Tom. I am____(九). I like____(白色的). It's a clean color. I have two basketballs. Look, they are____(在……下面) the bed. I think it's ____ (容易的) for me to play basketball. I always play it after class. Oh, what about my____(父母亲). My father____(喜欢) sports, too. He has____(一些) balls. You can see the balls____(到处) in his bedroom. My mother is a ____(教师). She doesn't____(有) any balls, she only watches sports games on TV.