一定是有什么误解。

There must have been a ___misunderstanding.

我想是有误解，因为他在电话里告诉我他已经和你安排了下周来。

I suppose there was a ___misunderstanding, because he told me on the phone that he had arranged with you to come next week.

迅速澄清任何误解很重要。

It's important to clear up any ___misunderstanding quickly.