$\text{1. Ann - who lives next door is very friendly}$

Do Ann và she đều là chỉ người nên mình dùng who nha

$\text{2. I don't know the name of the woman who you were talking to}$

$\text{3. Students whose homework late will be punished}$

Do đây là chỉ sỡ hữu => whom

$\text{4. Is this the house that you want to buy?}$

$\text{5. 7.00 is the time that we start the first class}$

$\text{6. The students who we met them at the party last night are all from Australia}$

$\text{7. The town which we spent our holiday there last summer was beautiful}$

$\text{8. This is Mr. Carter who I was telling you about}$

$\text{9. Swimming is a good sport that makes people healthy}$

$\text{10. Vietnam is the country that I was born in}$