根据上下文,从方框中选择适当的选项将对话补充完整,有两个多余的选项。 A. And these are my grandparents B. Thank you C. I'm OK D. Nice to meet you, David E. Yes, we are F. He is my friend G. How do you do Tim: How do you do, David! Bruce: Mom, this is my friend, David. Mrs Clark:___ 1 _! David: Nice to meet you, too, Mrs Clark! Bruce: 2 _. Grandparents: Welcome(欢迎) to our house. David: 3 . Grandparents: Are you in the same school? David: 4 . Bruce: David, this is my brother, Tim. David: 5 , Tim?