The chill truth is that students soon find their anticipations are a mere dream.这个句子里的are怎么解释,为什么不用is

The chill truth is that students soon find their anticipations are a mere dream.
这个句子里的are怎么解释,为什么不用is

be动词是由主语决定的,跟谓语无关

anticipations 是可数名词的复数形式，所示要用are,