2. Croak of frog
3. Rumbling of volcano
4. Howl of wolf
5. Fizz of champagne
6. Crunch of gravel
7. Crack of whip
8. Shuffling of feet
9. Babbling of brook
11. Beat of drum
12. Drone of bees
14. Cackle of hen
15. Chirp of bird
Xin lỗi, mình chỉ làm được đến thế thôi.