阅读理解。

     This is a picture of classroom. The classroom is big and clean. You can see a teacher's desk, six

desks and seven chairs. You can see a girl and a boy, too.

     Four books are on the teacher's desk. A pencil case is on the desk. Two pens and two rulers are

in the pencil case. A school bag is under a chair. A ball is on the floor.

     The girl is Mary, She is 11. The boy is Jack. He is 12. They are in Class Two. They are friends.

The teacher is Miss Smith. She is not here.

1.It's a picture of          .

A.boys and girls    

B.desks and chairs        

C.a classroom      

D.a bedroom

2.The two pens are          .

A.in the pencil case  

B.on the teacher's desk.    

C.on the floor      

D.in the bag

3.          is eleven.

A.Mary            

B.Jack      

C.Miss smith      

D.Mr Smith

4.          is not in the picture.

A.Mary            

B.Jack      

C.Miss smith      

D.Mr Smith

5.Mary and Jack are          .

A.teacher and students    

B.brother and sister    

C.good friends      

D.cousins

男女骨骼年龄的鉴别，通常的鉴定部位是（）

A、颅骨

B、尾骨

C、胸骨

D、盆骨