Ⅳ. Word study.
i. Synonym (近义词)
Synonyms are words that mean the same or very nearly the same, for example: “close” is a synonym of “shut”; “fast” is a synonym of “quick”.
ii. Antonym (反义词)
An antonym is a word that means the opposite of another word. For example, “bad” is an antonym of “good”.
Here are some examples:
The prefixes and suffixes are used to express the negative form of a word.

This is a vocabulary study about antonym prefixes and suffixes, not a math problem, so the specific solving steps according to math solving norms are not applicable. Here is the answer following the requirements of concise language and clear format:
I. Prefixes:
“im”: impossible / impolite / imbalance
“un”: unable / unimportant / unbelievable
“dis”: dislike / disappear / dishonest / disagree
“ir”: irregular
“il”: illegal / illogical
“in”: incorrect / inexpensive / inaccuracy
II. Suffixes:
“non”: nonstop / nonfiction / nonsmoking
“mis”: misunderstand / mislead / misbehave
“less”: careless / homeless / helpless / useless

Ⅴ. Practice: Fill in the blanks with the proper forms of the given words.
1. I respect you but I (agree) with what you say.
2. It would be (honest) not to present the data of infected people as fairly as possible.
3. Snow can (appear) straight into the atmosphere in hot, dry weather.
4. In the 21st century, some new viruses were (cover) in wild animals.
5. It is (legal) to kill and sell wild animals for money.
6. I know it sounds (believe), but I never mean to cheat.
7. Mozart was (unable) to write some amazing music at an early age.
8. The boss went out in a hurry with some (finish) papers left on his desk.
9. Don’t worry. This experiment is (harm) to wild animals.
10. The boy was so (careful) that he makes the same mistakes in his exam.
11. I’m (fear) that I can’t go with you this time.
12. Your possessions would become (worth) without your being healthy.
13. The supermarket became a popular one for its (expensive) products.
14. People sometimes receive some (correct) and useless information from the Internet.
15. Many teenagers are eager to become economically (dependent).

1. disagree
2. dishonest
3. disappear
4. discovered
5. illegal
6. unbelievable
7. able
8. unfinished
9. harmless
10. careless
11. afraid
12. worthless
13. inexpensive
14. incorrect
15. independent

1. 根据句意“我尊敬你但是不同意你说的”，agree的反义词disagree，且主语I，用动词原形即可。
2. 根据句意“不尽可能公正地呈现感染者的数据将是不诚实的”，honest的反义词在前面加“dis”。
3. 根据句意“在干燥炎热的天气里，雪可以直接消失在大气中”，appear的反义词为disappear，can后接动词原形。
4. 根据句意“在21世纪，一些新的病毒在野生动物中被发现”，cover的被动形式“been covered”表示被发现。
5. 根据句意“为了钱而捕杀和贩卖野生动物是非法的”，legal的反义词在前面加“il”。
6. 根据句意“我知道这听起来难以置信，但我从来不想骗人”，believe的形容词的反义词在后面加“un”。
7. 根据句意“莫扎特在很小的时候就能够创作出令人惊叹的音乐”，unable的反义词为“able”。
8. 根据句意“老板匆忙出去了，桌上有些没完成的文件”，finish的形容词的反义词为“unfinished”。
9. 根据句意“别担心，这个实验对野生动物无害”，harm的反义词在后面加“less”。
10. 根据句意“这个男孩如此粗心以至于在考试中犯了同样的错误”，careful的反义词在后面加“less”。
11. 根据句意“我恐怕这次不能和你一起去了”，fear的形容词用“afraid/fearful”，题中给的是fear，所以用“afraid”的相应形式，即“afraid”。
12. 根据句意“没有健康，你的财产将一文不值”，worth的反义词在后面加“less”。
13. 根据句意“这家超市因其产品不贵而受欢迎”，expensive的反义词在前面加“in”。
14. 根据句意“人们有时会从互联网上收到一些错误和无用的信息”，correct的反义词在前面加“in”。
15. 根据句意“许多青少年渴望经济独立”，dependent的反义词在词尾加“in”构成。