—Can I help you?

         —I’d like ____________ for my twin daughters.

         A. two pair of shoes                                               B. two pairs of shoe

         C. two pair of shoe                                                 D. two pairs of shoes

--Can I help you?

--I'd like ________ for my twin daughters.

1. A.
   two pair of shoes
2. B.
   two pairs of shoe
3. C.
   two pair of shoe
4. D.
   two pairs of shoes