补全对话。

A: Where's my ball? I can't find it.

B:

A: No, it isn't. It's my brother's.

B: Look, what's that under the chair?

A:

B: Is it your ball?

A: No, my ball is red. It's my sister's.

B:

A: Oh, yes. Thanks.

B: OK.

A. Let's go and play. B. Is it your ball? C. Look, your ball is in the desk. D. It's a ball. E. But it's green.