你想向别人介绍你的妈妈,你应该说: A. This is my mother. B. What’s my mother.
A: _______ that on the desk ? B: It's a photo.
A: This is your father's pen, I think. B: No, it's _______.
A: Is that your purse? B:_______ .
A: Where is Gao Shan? B:_______ .
A: May I have a rubber _______ my friend ? B: Sure.