二． 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.