1. His computer is more expensive than me. => mine

2. I like drink apple juice. It’s my favorite drink.
=> drinking
3. He is so intelligent as me.
=> as
4. Thu is writting a letter to her parents in her room.
=> writing
5. I and some of my classmates go to school the bus every day.
=> by
6. My son is studying in an university in China.
=> a