Exercise 3-Complete each sentence with the correct comparative or superlative form of the adjective in parentheses. 1. This book is __ (thick) than the one I read last week. 2.He is the __ (polite) person I have ever met. 3. My coffee is __ (strong) than yours. 4.Yesterday was the __ (warm) day of the year. 5. Your backpack is __ (light) than mine. 6. That was the __ (challenging) exam we've taken this semester. 7.My new apartment is __ (quiet) than my previous one. 8. This is the __ (busy) street in the city. 9.His explanation was __ (clear) than the teacher's. 10. This painting is the __ (colorful) in the gallery.

1. This book is thicker than the one I read last week.2. He is the politest person I have ever met.3. My coffee is stronger than yours.4. Yesterday was the warmest day of the year.5. Your backpack is lighter than mine.6. That was the most challenging exam we've taken this semester.7. My new apartment is quieter than my previous one.8. This is the busiest street in the city.9. His explanation was clearer than the teacher's.10. This painting is the most colorful in the gallery.

This exercise is about using the correct form of the adjective, either comparative or superlative, to complete each sentence. Comparative adjectives are used to compare differences between two objects or people, while superlative adjectives are used to describe the extreme or highest degree of something. In English, we usually add "-er" to the end of the word for the comparative form and "-est" for the superlative form. However, for words with three or more syllables, we usually use "more" for the comparative form and "most" for the superlative form.