Here are the correct answers for each sentence:

**Question 17:**
The __ of lavender filled the room.
**Answer:** A. fragrance

**Question 18:**
This can lead to the most __ changes in their behavior.
**Answer:** A. confident

**Question 19:**
They wonder how __ they should become.
**Answer:** C. confidently

**Question 20:**
The brave __ rushed into the burning building to rescue trapped residents.
**Answer:** C. firefighters

**Question 21:**
We are thrilled to announce that our school will hold a Sports Day on June 15th. This is a fantastic __.
**Answer:** A. opportunity

**Question 22:**
On this day, students will participate in various events, __ relay races, football matches, and tug-of-war.
**Answer:** D. including

**Question 23:**
All students are encouraged to join in and show their team spirit. The event will begin (23) __ 8:00 AM on the school grounds.
**Answer:** A. at

**Question 24:**
Please wear comfortable sportswear and bring a water bottle to stay hydrated.
**Answer:** B. to wear

Let me know if you need any more help!