I.

1)
Linh's parents are proud of him because he always gets good marks.
2 )
We used to be (very) interested in playing soccer when we lived in the countryside.
3)
I have not talked to my uncle since he bought a new house in city center.
4 )
The Browns buys a lot of food because the are going to have a party.
5) 
It is only a small car, so there is not enough room for all of us.

II. 

1. The girls are playing tennis at the moment.

2. Jonh always go to school by cả.

3. What do you do in the afternoon?

4. They are chatting in the class now.

5. My sister doesn't buy a new car.