1. Who is he? He is my good friend.
2. Is she your Chinese teacher? No, she is my classmate.
3. Which country is your classmate from? My classmate is American.
4. Who is that? That is my mum's friend.
5. Your classmate is American. How about your classmate's mum?      

1. Who is he? He is my good friend. 
2. Is she your Chinese teacher? No, she is my classmate. 
3. What country is your classmate from? My classmate is American. 
4. Who is that? That is my mum's friend.
5. Your classmate is American. Where is your classmate's mother.  How about your classmate's mom? 

1. Who is he? He is my good friend.

2. Is she your Chinese teacher? No, she is my classmate.

3. Which country is your classmate from? My classmate is an American.

4. Who are they? They are my mother's friend.

who is that？
That is my mother's friend.
this（这） that（那）

5. Your classmate is American. What about your classmate's mother?

1. Who is this? He is my good friend.
2. Is he your chinese teacher? No. He is my friend.
3.Where is your friend from? My friend is american.
4. Oh really? Of course, he is my mum's friend.
5. Your friend is american. Where is your mum's friend?

1. who is that? hi He is my good friend
2. Is she your chinese teacher?no, she is my fellow student.
3. which country are you from fellow classmate? I am your My fellow american student.
4. who is that? that is my mother's friend
5. you are an american student. is your mother an american student? Your classmate is American. How about your classmate's mom? 

1. Who is he? He is my good friend
2. Is she your Chinese teacher？No, she is my classmate
3. Where is your classmate from? My classmate is American 
4. Who is that? That is my friend's mum 
5. Your classmate is American. What about your classmate's mother?