1. Minh is a stamp__________________. He has many beautiful stamps (collect) 2. _________________ is Lan’s favorite pastime. (act) 3. We rehearse a play for the school anniversary ____________________ (celebrate) 4. I have too many ___________________ to finish today. (assign) 5. In most countries, there are _________________________ for teenagers. (organize) 6. American teenagers often learn to play a ____________________ instrument in their free time.(music) 7. My uncle has a big _________________ of coins. (collect) 8. We play volleyball for our school team and we always need more _____________________ (play) 9. What do Vietnamese _______________________ do to help the community? (teen) 10. Keep _________________ by doing exercise regularly. (health) chỉ cần từ trong ngoặc không cần viết lại