I make most of my money by writing books but I do __________ magazines sometimes.

  A. refer to      B. see to       C. contribute to       D. add to

 I make most of my money by writing books but I do __________ magazines sometimes.

  A. refer to      B. see to       C. contribute to       D. add to

I make most of my money by writing books but I do __________ magazines sometimes.

1. A.
   refer to
2. B.
   see to
3. C.
   contribute to
4. D.
   add to

 I make most of my money by writing books but I do __________ magazines sometimes.

  A. refer to      B. see to       C. contribute to       D. add to

I make most of my money by writing books but I do __________ magazines sometimes.

  A. refer to      B. see to       C. contribute to       D. add to