1. He is a **curious** boy. He is always asking questions.
2. All the pupils have done the exercises **easily**.
3. Keep **silent**! The teacher is explaining the lesson.
4. Be **careful** in your work!
5. Time passes **slowly** when you are alone.
6. He **drives** carefully. He rarely has accidents.
7. Ho Chi Minh city is an important **commercial** center.
8. We have a **weekly** newspaper in this town.
9. This exercise seems **difficult**.
10. Mrs. Green can help Alice to make a good **choice**.
11. He has **recently** bought a new car.
12. How **expensive** the dress is!
13. How **beautiful** those shop windows are!
14. She has finished her best **performance**.
15. The cartoon last night was very **interesting**.
16. She **frequently** goes to the movies with her younger sister.