1. 选择合适的应答语。
⑴Who's that woman?                      A. Yes, he is.
⑵Is he your grandpa?                      B. No, she isn't.
⑶Is she your sister?                        C. She's my mother.
⑷Who's that boy?                         D. Nice to meet you.
⑸Hi, Dad. This is my friend, Lucy.           E. He's my brother.