Question

一次of the students working hard at their lessons。

— Each of the students working hard at their lessons ________ the book.
— So have I.
A.is reading B.has read C.read D.reads
请解释为什么

Answer 1

— Each of the students working hard at their lessons ________ the book.
— So have I.
A.is reading B.has read C.read D.reads
答案：B
请解释为什么
这里主要看回答句中有个助动词have,所以可以看出问句中也应该有这样的助动词have,因为主语是单三形式,所以助动词have以has的形式出现.