用am,is或are填空（不需要的用“/”表示）。
（1）I       Li Lei. She      Lucy. She and I      good friends.
（2）What      these over there? Oh, they      my sweaters.
（3）your book red? Yes, it      .
（4）your book and pen red? No, they      not.
（5）your books red? Yes.
（6）My clothes        blue. His      yellow.
（7）Lucy and Lily      twins. They        American. They      look the same.
（8）Miss Gao        our English teacher. She      has a son.
（9）His name        Sun Huimin. He      in our class.
（10）The students of Class Three      on the hill now.