根据对话内容，从方框内选出能填入空白处的最佳选项，其中有两项为多余项。

A: Hi, David.      
B: It’s 5:00.
A: The class will be over soon.        
B: I’ll go to the English Club. And you?
A:        
B: Is swimming your favorite sport?
A: Yes, I like it best.
B:        
A: Because it keeps my heart and lungs healthy.
B: I think so.       
A: Certainly. I’ll call you if I go.