a very close friend的用法和样例：
- We lament the death of a very close friend of ours.
- My destination was Fe Gang, a very close friend was waiting for me there!
- Jo is a very close friend.
- "It's not a billet doux which says 'Darling, you were marvellous last night', but it is a letter to a very close friend of hers in which she compares the death of someone to the death of her husband.
- She has a very close relationship with her sister.