Sure! Here are the filled gaps according to the words provided:

**Practice 1: Fill each gap with one given word**

1. A few teenagers in my village have **dyed** their hair brown.
2. Young people's lifestyle today is different from that of the previous **generation**.
3. Nowadays, nearly all young people have an **opportunity** to go to school.
4. He wants to live green, so he uses products made from natural **materials**.
5. My parents give me **freedom** to pursue my own interests.
6. Protect your personal **privacy** online by using strong and unique passwords.

**Practice 2: Give the correct form of the bracketed word**

1. My grandparents taught me not to listen to other people's **conversations**. (privacy)
2. I’m amazed that the boy can recall all the information in such a short time. (memory)
3. Living away from home to attend college has made me more **dependent**. (depend)
4. In a modern society, we learn to value a person's **freedom**. (free)
5. In a classroom, every student has the right to speak as well as the responsibility to listen to others. (democracy)

**Practice 3: Use an adjective or adverb to replace the underlined**

1. Vietnamese people's lives have been improved **significantly** to make a difference.
2. There has been a **slight** increase in people's income over the last ten years.
3. Compared to 2 years ago, there have been **considerably** minor differences in the country's policies.
4. The training has been upgraded **dramatically** and to a great degree.
5. There have been **quite** large changes in the way people work.

**Practice 4: Rewrite the following**

1. We learn from various sources such as clips from the internet. (provides)
2. We learn from articles and textbooks. We also use the internet. (besides)
3. I was surprised when they offered me the post. (blue)
4. They died unexpectedly to some extent. (die)

**Practice 5: Complete the sentences**

1. I enjoy / dislike / use fireworks / Tet and weddings.
2. A good student should try to be / far / change / better.
3. Today our society depends heavily on / electronic devices.
4. I prefer / spend / learn / cook traditional foods.
5. My grandmother enjoys / use Facebook / communicate / her friends.

Feel free to ask if you need further assistance!