I dont know why a quarrel broke out between the two neighbours because they used to be close friends.

我不知道为什么这两个邻居之间会发生争吵，因为他们以前曾是很亲密的朋友。

youdao

I dont know why a quarrel broke out between the two neighbours because they used to be close friends.

我不知道为什么这两个邻居之间会发生争吵，因为他们以前曾是很亲密的朋友。

youdao