Butter and bread___ their daily food,but the bread and the butter ___ up now.A.is;is eaten B.are; have been eaten C.are; are eaten D.is; have been eaten不需要解释现在完成时的被动语态,只想知道第一个空为什么用is,而第二个空用have.

问题描述:

Butter and bread___ their daily food,but the bread and the butter ___ up now.
A.is;is eaten B.are; have been eaten C.are; are eaten D.is; have been eaten
不需要解释现在完成时的被动语态,只想知道第一个空为什么用is,而第二个空用have.