根据对话内容，从方框内的选项中选出能填入空白处的最佳选项，其中有两个为多余选项。

A. This watch isn't mine. B. What's wrong? C. What colour is it? D. You're welcome! E. Good morning, Wang Ming! F. Is this watch yours? G. Whose watches are these?

Tim: Welcome to the lost and found office!

Wang Ming: Good morning, Tim!

Tim:

Wang Ming: Can you help me?

Tim: Sure!

Wang Ming: I can't find my new watch.

Tim:

Wang Ming: It's black.

Tim: Well...Look!

Wang Ming: Let me see... Oh, it's mine! Thank you!

Tim: