It is a dream that had come true in 1969.要改成It is a dream that came true in 1969.为什么?

问题描述:

It is a dream that had come true in 1969.要改成It is a dream that came true in 1969.为什么?

It is……that+一般过去式… It was……that+过去完成式…嘻嘻,这是固定搭配…