关于since的选择题

问题描述:

关于since的选择题
39.–How long has this bookshop been in business?-- _______ 1994.
A.After B.In C.From D.Since
C为什么不行哦
from也有从什么时候起的吧

问题中有一个have been,若为陈述句,句子可以是this bookshop has been in business Since 1994. ,而from不行