Ex1 :
/ f / : Knife , of , cough , leaf , paragraph , phonetics , stephen , laugh , enough .
/v/ : leaves , level , live , very , conversation , move , lovingly .
Ex2 :
1. stomachache
2. earchache
3. sore throat
4. cough
5.toothache
6. headache
7.flu
Ex3 :
1. less
2.less
3.more
4.less
Xin câu trả lời hay nhất ạ kkk