Certainly! Here are the answers to the questions as requested:

**IV. CLOSEST in meaning:**

1. Some teens might feel peer pressure, so they change the way they talk or the words they use to feel accepted and appreciated by their friends.
- **A. friend**
- **B. counsellor**
- **C. teacher**
- **D. school**
*Closest meaning: A. friend*

2. Counsellors help teens with the challenges of staying healthy, supporting their mental well-being.
- **A. Constructors**
- **B. Teenagers**
- **C. Advisors**
- **D. Dwellers**
*Closest meaning: C. Advisors*

**V. OPPOSITE in meaning:**

1. The city centre buzzes with a constant flow of people and vibrant activities from dawn till dusk.
- **A. colourful**
- **B. energetic**
- **C. dull**
- **D. exciting**
*Opposite meaning: C. dull*

2. Young artisans should be ready face up to the fact that their products have to compete with many other famous ones in the market.
- **A. avoid**
- **B. remember**
- **C. find solutions to**
- **D. deal with**
*Opposite meaning: A. avoid*

**VI. UNDERLINED part that needs correction:**

1. The more bigger the school is, the more comfortable the students feel.
- **A. is**
- **B. the more comfortable**
- **C. The more bigger**
- **D. feel**
*Needs correction: C. The more bigger* (It should be "The bigger the school is...")

2. Lan can't make up her mind where to spending this summer holiday: Da Lat or Phu Quoc Island.
- **A. make up**
- **B. where**
- **C. to spending**
- **D. or**
*Needs correction: C. to spending* (It should be "to spend")

3. Lily became more independent since starting university, which makes her family happy.
- **A. became**
- **B. independent**
- **C. starting**
- **D. makes**
*Needs correction: C. starting* (It should be "since she started university")

Let me know if you need further assistance!