Question

Compareyour answers to these questions with ______ your classmates．

1. A.
   /
2. B.
   thatof
3. C.
   those of
4. D.
   which of

Answer 1

C
句子主干是“compare sth．with sth．”比较两个对应的人或物，所以不选A；“those”指代“the answers”。