-When did you open the shop?

问题描述:

-When did you open the shop?
-In 1990.It's ____ for twelve years.
A.opening B.opened C.been open D.opens

C
那个s是has,之所以用been open是因为如果是用动词的话,他是不可延续动作,所以这里只能将其理解为形容词.