We’re not very close friends______ we’ve known each other for a long time.
句意：虽然我们认识很长时间了，但我们不是很亲密的朋友。
考查连词辨析。until直到，表时间；although尽管，虽然，表让步；as因为，表原因；if如果，表条件。根据语境可知，虽然我们认识很长时间了，但我们不是很亲密的朋友，故此处应用连词although表让步。故选B。
We’re not very close friends______ we’ve known each other for a long time.
Give me a chance, ________I will give you a wonderful surprise.
Lucy held her head up like a queen______ Bill was telling his tale.
Father is too tired today. Don’t call him ________ it is necessary.
I will volunteer for a two-day home stay for an exchange student from the UK. I consider it a good chance to show Chinese food________our kindness.
—I heard a young fireman lost his life in the big fire.
—What a pity! ________I don't know who he is, I know who he is for. He is our hero forever.
We were not good friends ________we saw each other, but gradually, we got along better and better.
— It’s said that Zhou Jielun will hold a concert next month in Xiangyang.
— I’m sure the fans will be happy _______ it’s true.
We will never see Kobe play another basketball game, ________we will always remember him.
It's not easy to change habits, ______ with strong will and self-control, it is possible.
