we / friends / at university

 we / friends / at university

GRAMMAR (Ngữ pháp)

Đề bài:

a.     We have been friends since we were at university.

b.     We make friends when we were at university.

c.    We are friends as we were at university.

d.    We have been friends even though we were at university

a.     We have been friends since we were at university.