Butter and bread___ their daily food,but the bread and the butter ___ up now.

Butter and bread___ their daily food,but the bread and the butter ___ up now.

题目
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.
答案
举一反三
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