一、用所给单词的正确形式填空
1. We should eat more vegetables because they are (health) food.
2. The sick man is getting even (bad).
3. Who jumped (far) in the long jump in this sports meeting?
4. I like the soup because it's (taste) than any other dish.
5. The man spoke more (polite) than his wife.
6. Those who are lucky enough to be (wealth) should help the hungry.
7. Shanghai is in the (east) part of China.
8. My sister was fined 50 yuan for driving (care).
9. Jim's works have produced a (last) influence on young people.
10. You'll find Bob (interest) if you talk with him more.
11. The firemen have saved the boy from the fire (success).
12. (sad), it is more difficult for giant pandas to survive in the wild.
13. It takes time to study and understand a sudden attack on humans by a(n) (know) virus.
14. Karl runs a shop in a (centre) location in the city.
15. Tom stepped on the (break) glass on the path.
16. The boy feels a little (close) to his father than to his mother.
17. Kitty has the (little) bread of us three.
18. The (pollute) air is the biggest enemy against people's health.
19. A lot of people don't have enough money for (medicine) treatment.
20. Ben's (old) sister is a teacher and his younger sister is a doctor.
21. Are you (satisfy) with my grades, Mum?
22. Choose (wise) how you spend time, and with whom you spend it.
23. Don't open your books. Keep them (close), please.
24. The talk made all of us feel . (bore)
25. The question is not very difficult. You can work it out (easy).
26. I think the mooncakes with nuts are the (nice) of all.
27. The woman looked (angry) at the young man and didn't say a word.
28. This is (exact) what I want. Thank you.
29. The girl is a top student in her school. She'll enter a famous university for (far) study.
30. Tom felt and fell very soon. (sleep)
31. This was such a (bored) film that I could hardly keep my eyes open.
32. The (high) you climb, the more beautiful view you will see.
33. The police searched everywhere for the (miss) boy and didn't find him.
34. (luck), Jim got back all the money he had lost.
35. Jack was (bad) ill and we had to take him to the hospital at once.
36. Drinking too much beer is (harm) to your health.
37. Please speak (clear) when you answer the teacher's questions.
38. The number zero was (know) to the ancient Romans.
39. English is (wide) spoken all over the world.
40. Yang Ming was swimming in the river when (sudden) the rain started.

一、1. healthy 2. worse 3. farthest 4. tastier 5. politely 6. wealthy 7. eastern
8. carelessly 9. lasting 10. interesting 11. successfully 12. Sadly 13. unknown 14. central
15. broken 16. closer 17. least 18. polluted 19. medical 20. elder 21. satisfied 22. wisely
23. closed 24. boring; bored 25. easily 26. nicest 27. angrily 28. exactly 29. further 30. sleepy;
asleep 31. boring 32. higher 33. missing 34. Luckily 35. badly 36. harmful 37. clearly
38. unknown 39. widely 40. suddenly

【分析】
这类词形转换填空题的解题思路可以分三步：1. 先通读整个句子，分析空格在句中的成分，判断空格处需要的词性（形容词、副词、名词、比较级/最高级形式等）；2. 寻找句中的提示线索，比如出现than要考虑比较级，出现of all/ in+范围要考虑最高级，修饰名词用形容词、修饰动词/形容词/整个句子用副词等规则；3. 结合所给单词，按照英语词形变化规则变形，同时验证是否符合语境逻辑和固定搭配要求，避免出现语义相反的错误。
【解析】
逐题解析：
1. 空格后是名词food，需要形容词作定语修饰food，health的形容词形式为healthy，healthy food表示健康的食物。
2. 副词even后常修饰形容词/副词的比较级，表示“甚至更…”，bad的比较级是worse，句意为病人情况变得更差了。
3. 句中限定范围是本次运动会所有参赛者的跳远表现，是多者之间的比较，要用far的最高级farthest，表示跳得最远。
4. 句中出现than，要用形容词比较级，taste的形容词形式是tasty，比较级为tastier。
5. 句中出现than，空格修饰动词spoke，要用副词的比较级，polite的副词形式是politely，其比较级是more politely。
6. 空格前是be动词，后面需要形容词作表语，wealth的形容词形式是wealthy，表示富有的。
7. 空格后是名词part，需要形容词修饰，east的形容词形式eastern，表示东部的。
8. 句意为姐姐因为粗心驾驶被罚款50元，空格修饰driving，要用副词，care的反义副词carelessly，表示粗心地。
9. 空格修饰名词influence，需要形容词，last的形容词形式lasting，表示持久的，lasting influence表示持久的影响。
10. 此处修饰Bob的属性，用interest的形容词interesting，表示有趣的。
11. 空格修饰前面的动作save，要用副词successfully，表示成功地。
12. 空格放在句首修饰整个句子，要用副词Sadly，表示不幸的是。
13. 句意为未知病毒的突然袭击，空格修饰virus，用know的否定派生词unknown，表示未知的。
14. 空格修饰名词location，需要形容词，centre的形容词形式central，表示中心的。
15. 空格修饰名词glass，用break的形容词broken，表示破碎的。
16. 句中出现than，要用形容词比较级，close的比较级是closer。
17. 句中范围是of us three三者之间，要用little的最高级least，表示最少的。
18. 空格修饰名词air，pollute的形容词polluted，表示被污染的。
19. 空格修饰名词treatment，medicine的形容词medical，表示医疗的，medical treatment表示治疗。
20. 表示年长的姐姐，用elder，elder sister是固定搭配表示姐姐。
21. 固定搭配be satisfied with，表示对…满意。
22. 空格修饰动词choose，要用副词wisely，表示明智地。
23. 固定搭配keep sth + adj，表示使某物保持某种状态，close的形容词closed表示关着的。
24. 第一空修饰事物talk，用boring表示无聊的，第二空修饰人us的感受，用bored表示感到无聊的。
25. 空格修饰动词短语work it out，要用副词easily，表示容易地。
26. 句中范围是of all所有月饼里，要用nice的最高级nicest，表示最好吃的。
27. 空格修饰动词looked at，要用副词angrily，表示生气地。
28. 空格修饰表语从句what I want，要用副词exactly，表示恰恰，正是。
29. 固定搭配further study，表示深造，far的抽象比较级further。
30. 第一空feel是系动词，后面接形容词sleepy表示困倦的，第二空固定搭配fall asleep表示入睡。
31. 修饰事物film，用boring表示无聊的。
32. 固定结构the + 比较级，the + 比较级，表示越…越…，high的比较级higher。
33. 空格修饰名词boy，miss的形容词missing表示失踪的。
34. 句首修饰整个句子，用副词Luckily，表示幸运的是。
35. 空格修饰形容词ill，要用副词badly，表示严重地，badly ill表示病得很重。
36. 固定搭配be harmful to，表示对…有害。
37. 空格修饰动词speak，要用副词clearly，表示清晰地。
38. 句意为古罗马人不知道数字0，用know的否定派生词unknown，表示不被知晓的。
39. 空格修饰动词spoken，要用副词widely，表示广泛地。
40. 此处表示突然雨下起来了，用副词suddenly修饰整个从句。
【答案】
1. healthy 2. worse 3. farthest 4. tastier 5. politely 6. wealthy 7. eastern
8. carelessly 9. lasting 10. interesting 11. successfully 12. Sadly 13. unknown 14. central
15. broken 16. closer 17. least 18. polluted 19. medical 20. elder 21. satisfied 22. wisely
23. closed 24. boring; bored 25. easily 26. nicest 27. angrily 28. exactly 29. further 30. sleepy;
asleep 31. boring 32. higher 33. missing 34. Luckily 35. badly 36. harmful 37. clearly
38. unknown 39. widely 40. suddenly
【知识点】
词形转换，形容词副词比较级最高级，词性修饰规则
【点评】
本题是初中英语词形转换的经典基础题型，全面覆盖了名词变动词/形容词/副词、比较级最高级变形、常见固定搭配、-ed/-ing形容词区分、否定派生词等核心考点，能够有效检验学生对词性修饰规则的掌握程度，多数题目都有明确的提示线索，适合巩固基础词形变化知识点。
【难度系数】
0.7