`1`. Linh's parents are very proud of him because he always gets good marks.

`2`. We were very interested in playing soccer when we lived in the countryside.

`3`. I haven't talked to my uncle since he bought a new house in the city center.

`4`. The Browns have bought a lot of food because they are going to have a party.

`5`. It is only a small car, so there isn't enough room for all of us.

$\color{black}{1}$

→ Linh's parents are  proud of him because he always gets good mark .

$\color{black}{-}$ Proud of sb : Tự hào về 

$\color{black}{2}$

→ We were very interested in playing soccer when we lived in the countryside.

$\color{black}{-}$ Interested in  + Ving : thích thú 

$\color{black}{3}$

→ I haven't talked my uncle since he bought a new house in the city center.

$\color{black}{-}$ S + Haven't/Hasn't + V3/Ved + O +.....Since/for ....

$\color{black}{4}$

→ The browns buys a lot of food because they are going to have a party

$\color{black}{-}$ S + tobe going to + V + O +....

$\color{black}{5}$

→ It is only a small car, so there isn't enough room for all us.