Question

All ________ come to the party and all ________ prepared, so let's begin our party．

1. A.
   have … has been
2. B.
   has … have been
3. C.
   has … has been
4. D.
   have … have been

Answer 1

A
all和both这两个不定代词做主语，如果指“所有的人”，谓语动词用复数，如果指“所有的物”，谓语动词用单数。这句句子的意思是“所有的人都来了，所有的东西都准备好了，所以让我们开始举行聚会吧。”所以前面谓语动词用复数，后面谓语动词用单数。