根据对话内容从方框中选择能填入空白处的最佳选项补全对话。其中有两项多余

A: Hey, Mark!  

B: Yes! It's a boy. The hole is so deep!  

A: We should call 911.

B: Good idea!  

A: Get something to eat for him.

B: I see. Let me throw my bread to him.

A:  

B: Do you know what else we should do to. help him?

A: We should help him to stay warm.

B: OK.  

A: You're a nice boy, Mark!

A. Sounds good. B. What happened? C. What can we do to help him? D. Let's send him to the hospital. E. Let me throw my coat to him. F. Someone fell into the hole over there. G. But what should we do before help arrives?