Dựa trên yêu cầu của bạn, tôi sẽ hoàn thành bảng và các bài tập sau đây:

**Bảng phân loại âm**:

| /aɪ/ | /aʊ/ | /eɪ/ |
|-----------|-----------|-----------|
| nightmare | overcome | downtown |
| cooperate | cloudy | homegrown |
| compare | around | accountant |
| underground | browse | motorbike |
| | upstairs | fountain |

**Exercise 2**:
- Circle (vòng) những từ với âm /aʊ/, underline (gạch chân) những từ với âm /eɪ/ và double underline (gạch đôi) những từ với âm /eə/.

1. My parents are at the airport at the moment. (airport: /eə/)
2. The restaurant was crowded, so we decided to eat outside instead. (crowded: /aʊ/)
3. After spending the whole day at the funfair, we were tired. (funfair: /eə/)
4. We live in an old house with a narrow garden. (house: /aʊ/)
5. Tomorrow, we are going to the park for a picnic with our friends. (picnic: /eə/)
6. My sister has long brown hair and a straight nose. (brown: /aʊ/)
7. I am learning about rainbows in science class now. (rainbows: /eə/)
8. Let me show you how to prepare a simple salad for lunch. (prepare: /eə/)
9. Can you buy some pears and tomatoes from the grocery store? (pears: /eə/)
10. Linda is too scared to go on the roller coaster at the amusement park. (roller: /eə/)

**Exercise 6**:

1. My friends ride their bikes to **get around** the city every weekend.
2. We turn off lights when we leave a room to **cut down on** electricity.
3. Linda and Anna are **carrying out** a project to plant trees in the park.
4. Yesterday, I **came down with** a stomach ache after eating too much candy.
5. Jane is excited to **carry out** a plan to go camping with her family.
6. We enjoy **hanging out with** our neighbours in the evening.
7. Oscar couldn't go to school last Monday because he **came down with** a fever.
8. We should not throw trash in the river to **cut down on** water pollution.
9. I can't **get around** my friends because I have to do my homework.
10. If you want to **get around** London, you can take a bus.

Nếu có yêu cầu hoặc câu hỏi bổ sung nào khác, hãy cho tôi biết!