根据下面对话中的情景，在每个空白处填入一个适当的语句，使对话恢复完整

A: Tomorrow is Sunday. Do you have any plans?

B: 1             The newspaper says there will be a dolphin show there at 3:00 pm.

A: Sounds great! I also like dolphins. Can I go with you?

B: Of course you can.

A: 2              

B: How about going by bicycle?

A: Oh, my bike is broken（坏的）．

B: 3             Then we can walk there.

A: OK. 4                         

B: Let us meet at the gate at one. 5                   

A: OK. See you.

B: See you then.

下列元素在自然界没有游离态存在的是（       ）

A．碳

B．硅

C．氮

D．硫