B1:
1. Linh's parents are proud of him because he always gets good marks.
2. We are very interested in playing soccer when we lived in the countryside.
3. I haven't talked with my uncle since he bought a new house in the city center.
4. The Browns buy a lot of food because they are going to have a party.
5. It is not only a small so there isn't enough for all of us.
B2:
1. received
2. for
3. working
4. number
5. an
6. gone
7. will
8. there
9. never
10. found