通读下面的对话，然后根据上下文补全对话内容。
A: Hi, David! 1 ?
B: Hi, Sarah! I am going to see Anna. She is in hospital.
A: 2 ?
B: She had a traffic accident on her way to school and was hurt.
A: 3 . Is there anything serious?
B: Yes, there is something wrong with her head.
A: Oh, my God! 4 .
B: I hope so, too.
A: 5 ?
B: Sure. Let's go!