----Jim,is this your pencil-box? ----No,it's not.It's Tom's. [ ] A. mine B. yours C

----Jim,is this your pencil-box? ----No,it's not.It's Tom's. [ ] A. mine B. yours C. his D. hers

The dialogue involves identifying the owner of a pencil-box. Jim denies it's his and states it belongs to Tom. Since Tom is male, the correct possessive pronoun should refer to him.

Answer: C. his

In the conversation, Jim clarifies "It's Tom's," so the pencil-box belongs to Tom. "His" is the masculine possessive pronoun matching Tom, making option C the right choice. "Mine" (A) would refer to Jim, "yours" (B) to the questioner, and "hers" (D) to a female—none fit Tom's gender.