选择正确的单词，横线上填写编号

A. their   B. yours   C. his   D. ours

Mr.. Jones: Look, the bunny is so lovely. Whose is it?

Sarah: It's Oliver's.

Mr.. Jones: Yes, it's . There are three black kittens. Whose kittens are these?

Mike: Are they John and Jack's?

Binbin: Yes, they're kittens.

John: Binbin, you're right. The kittens are. . Now they're twenty days old.

Mr. Jones: Is this parrot , Binbin?

Binbin: Yes. It is very clever. It can speak English.

Mr. Jones: Really? That's cool.