四、用所给单词的正确形式补全短文。
come hour he play be doctor activity leave can quiet
Nick is a 14-year-old schoolboy. His life 16. full of exams and studies on weekdays. He has little free time. He feels really relaxed when he 17. computer games. When he has free time, he sits 18. in front of the computer. Just in that way, he neither eats nor drinks for several hours.
Last weekend, he played games on the computer alone again and didn't want 19. the computer. He didn't have anything for six 20. . When he had to go to the toilet, he found he 21. not move. He was taken to the hospital. The doctor told him he should do different kinds of 22. if he wanted to feel better. In other words, more exercise and outdoor activities would help 23. to have a healthy body.
After 24. back from the hospital, Nick follows the 25. advice. He often plays football with his friends. Sometimes he still plays computer games at week-ends, but he never does it for long. Now, he lives a happier and healthier life than before.

16. is 17. plays 18. quietly 19. to leave 20. hours 21. could 22. activities 23. him 24. coming 25. doctor's

【分析】
这道题是用所给单词的正确形式补全短文，需结合短文语境、语法规则（时态、词性、固定搭配等）确定单词变形。解题思路：先通读全文理解大意（Nick沉迷电脑游戏致健康问题后调整生活），再逐个分析每个空：根据主语确定be动词形式，依据时态变动词形式，按“副词修饰动词、固定搭配want to do、名词复数、动名词、名词所有格”等规则变形单词。
【解析】
16. 主语His life是单数，一般现在时，be动词用is；
17. 主语he是第三人称单数，一般现在时，play变plays；
18. 修饰动词sits，用副词quietly；
19. 固定搭配want to do sth，填to leave；
20. six后接名词复数，hour变hours；
21. 全文为过去时态，can的过去式是could；
22. different kinds of后接名词复数，activity变activities；
23. help是动词，后接人称代词宾格，he变him；
24. after是介词，后接动名词，come变coming；
25. 修饰名词advice，用名词所有格doctor's。
【答案】16. is 17. plays 18. quietly 19. to leave 20. hours 21. could 22. activities 23. him 24. coming 25. doctor's
【知识点】一般现在时、词性转换、名词所有格
【点评】本题考查词汇在语境中的正确形式，涉及基础语法和固定搭配，需结合上下文灵活变形，难度适中。
【难度系数】0.6