Ответ:

1) We are classmates (одноклассники).

2) He is just an acquaintance (знакомство).

3) They are colleagues (коллеги).

4) She is my aunt (тётя).

5) They are our neighbours (соседи).

6) She is my stepmother (мачеха).

7) She is my niece (племянница).

8) He is my nephew (племянник).

Ответ: 1 — classmates; 2 — acquaintance; 3 — colleagues; 4 — aunt; 5 — neighbours; 6 — stepmother; 7 — niece; 8 — nephew.