Alex Smith，a fifteen-year-old boy，studied in an American boarding school （寄宿學(xué)校）．In this school，students could go into town after school in the afternoon．（1）

C

C

．One afternoon，Alex walked to the town．He looked about at the shops and then went to a cinema．（2）

B

B

．It was eight o'clock．He was a little worried．He walked back to the school as fast as possible．
When he arrived，he ran quickly to the main entrance（人口）．It was locked．He looked up at the window of his dormitory（宿舍）．It was on the third floor．The window was open．（3）

E

E

．But the door was also locked．Then he saw another open window on the first floor．It was the window of the teachers' office．（4）

A

A

．Alex quickly climbed into the room．Just then，he heard someone opened the door．He had to hide under the sofa at once．One minute later，a teacher came in．（5）

D

D

．Under the sofa Alex had to lie on the floor．

A．He looked into the room-no one was there．
B．After the film was over，he looked at his watch．
C．But they must go back to the school before six o'clock．
D．The teacher turned on the light，sat down on the sofa and began to read a book．
E．But it was quite dark and he went round the school building to another door．