What I like best, to tell you the truth, ____, in my opinion, the books my brother bought me as my birthday present last week.

1. A.
   are
2. B.
   is
3. C.
   have
4. D.
   existed

What I like best, to tell you the truth, ____, in my opinion, the books my brother bought me as my birthday present last week.

A. are            B. is               C. have          D. existed

What I like best , to tell you the truth ,        in my opinion , the books my brother bought me as my birthday present last week .

       A．is      B． are  C．have        D．existed