There was/were问题

问题描述:

There was/were问题
Once upon a time,there _______ an old man and an old woman.
横线上应填上was还是were?请简单解释一下

Once upon a time,there ___was____ an old man and an old woman.
therebe句型的就近原则我以为an old man and an old woman是复数,所以是were?不是的, therebe结构中, be 的变化取决于最靠近be 的词那如果是two old men and an old woman,那就是were了?是的