选句子完成短文

     Now,everyone.1 want to tell you something about my school.    1   It is on Coolidge Street near the center of town. It's between the bookshop and the bank.

     As you walk in the school, the first thing you see isthe library.  2  On the right, next to the library, you can see a gym. Sometimes we play volleyball there.

     I'm in Class 7 and our classroom is on the first floor,next to the computer room. Our teacher is called Ms Perry. Across from the computer room, you can see three science labs.    3    

     I go to school by bus.   4   His name is Henry. He is very nice to all the children.I have many friends at school and my aunt June works in the school, too. She is a maths teacher.

     I hope you can visit my school someday.

能判明肝硬化并发上消化道出血部位和病因的实验室检查是（）

A.X线钡餐造影

B.肝功能测定

C.粪便隐血检查

D.B超

E.胃镜