They are the best  books          I  have  read this year.

  A. who                B. that             C. these      D.those

I have read this book many times. I almost know ______ in it.

[    ]

They are the best  books         I  have  read this year.

They are the best  books         I  have  read this year.

1. A.
   who
2. B.
   that
3. C.
   these
4. D.
   those