The boys each _____________ (be) excited to see so many amazing things yesterday.

问题描述:

The boys each _____________ (be) excited to see so many amazing things yesterday.

用were each是boys的同位语 是对boys的限定(同位语:对另一个名词或代词进行修饰,限定或说明,这个名词或其它形式就是同位语.同位语与被它限定的词的格要一致,并常常紧挨在一起.)