I am not sure how long they _.

问题描述:

I am not sure how long they _.
A.have married
B.have been married
C.have got married
D.married
为啥?

结婚的短语是be married或者是get married.两者的区别是get married 是结婚的那个动作是不延续动词,那个是结婚的状态.这句话的意思是我不确定他们结婚多久了,要用现在完成时,所以综上2点原因选B