6.There is a box ______my bag.

5.______the door, there is a ball.

4.Peter is ______American boy.

3.　 Clean ______blackboard, please.

2.　 There are ten pictures ______the wall.

1.There is ______big classroom in my school.

5.Millie is my sister. ______are good friends.

C.用a, an , the, behind, on , in from 填空,不可重复

4.What is your father? ______is a teacher.

3.Am ______in Class One?

2.Is Lily your sister? Yes, ______is.