短文填空（本大题有10小题，每小题1.5分，共15分） 

Li Ming was a good school boy before. He  1.  to do well in all his lessons. But these days he turned out to be another Li Ming. He  2.  asleep in class. He has been late for school three times since last Friday. Yesterday they took an English test. He failed. But he always got over 90 before. His head teacher, Rose, didn’t know  3. . So she decided to go to his home and found out the reason. On her 4. to his home, she passed by a net bar. To her  5. , she saw Li Ming playing computer games excitedly inside. Then she  6. what had happened. She went into the net bar and pulled him out. Li Ming was very frightened because she was very  7. with him. He didn’t know how she would deal with him. She  8. beat him nor punished(惩罚) him. Instead, she told him playing computer games was bad for his health and  9. . She also asked him not to lose himself in it. Li Ming  10. to give up computer games and study hard to achieve his dreams.

________ I left the classroom, Li Ming was doing his homework.

1. A.
   When
2. B.
   While
3. C.
   Before
4. D.
   After