从Ⅱ栏中找出Ⅰ栏句子的答语。

Ⅰ                                    Ⅱ

⑴Who's that boy?               A. I'm from the UK.

⑵Is she your mother?            B. OK.

⑶Let's play teacher and student.   C. He's my brother.

⑷Where are you from?          D. Yes, she is.

⑸We have two new friends today.  E. Welcome.