【选择】50.it ( )Mike and Mary who helped the old man seveal day ago.

问题描述:

【选择】50.it ( )Mike and Mary who helped the old man seveal day ago.
( were / was / are / had been)
这题选什么,理由是.

was这是一个强调句结构,它的构成 是:It is.+被强调部分+..that/who.+剩下部分It was.+被强调部分+..that/who.+剩下部分也就是说,在这个句子中,是IT作主语,无论什么时候,谓语动词只能用单数.不存在用WERE的情况了.又...