---How was your weekend?

?? ---Great! It was my grandfather’s _________ birthday. We enjoyed ourselves.

A. seventy???????? B. seventieth??????? C. the seventieth?????? D. seventeenth[

― How was your weekend?      

―________

A. It was good.           

B. I'd like to visit my uncle for this weekend.     

C. The same to you! 

D. I used to spend my weekend in the countryside.

--- how was your weekend?

       ---- Great! It was my grandfather’s _______ birthday. We enjoyed ourselves.

        A. seventy       B. seventieth    C.  the seventieth     D. seventeenth