― Do you often visit your grandparents?

― Mmm… ________ , I'm afraid. I usually phone them.

A. over again        B. time and again         C. once again         D. now and again

— Do you often visit your grandparents?

　— Mmm… ________ , I’m afraid. I usually phone them.

A. over again　        B. time and again    C. once again 　     D. now and again

— Do you often visit your grandparents?　

— Mmm… ________ , I’m afraid. I usually phone them.

1. A.
   over again
2. B.
   time and again
3. C.
   once again
4. D.
   now and again