题目内容：

完型填空

Maggie started of the junior year of high school with great energy. She had no trouble     up with her schoolwork and took part in several after-school activities.     after the Thanksgiving break, she began to have trouble getting through her reading and had to work harder to apply herself (专心学习). Her grades began to   , and she rarely (很少) felt like making friends any more. Even though Maggie was always punctual (按时的) before, she began to have trouble getting up    time for school during the winter.  

At first, Maggie’s parents thought she was lazy. They were quite worried about her, but they thought it was just a period of time—especially because her energy finally seemed to     in the spring. But when the same thing happened the next November, and Maggie’s mood and her grades fell again, they took her to the     , who diagnosed (诊断) her with a type of depression (情绪低落) called seasonal effective disorder (季节性情绪失控症), or SAD. SAD appears and     at the same time each year. People with SAD have the depression as winter comes and daylight hours become    . When spring returns and the days become longer again, they become well again. Like other forms of depression, the symptoms (症状) of SAD    be mild, severe(严重的), or somewhere in between. Milder symptoms slightly influence someone’s ability to take part in everyday activities, but more severe symptoms can influence much    .

1.15. A. to keep B. keeping C. keep D. kept

2.16. A. While B. So  C. But D. Because

3.17. A. drop B. rise C. raise D. stop

4.18. A. in B. on C. off D. through

5.19. A. go B. return C. disappear D. leave

6.20. A. teacher B. farmer C. doctor D. police

7.21. A. disappears B. appears C. arrives D. leaves

8.22. A. long B. short C. longer D. shorter

9.23. A. can B. must C. should D. have to

10.24. A. little  B. less C. many D. more