用方框内所给句子，完成对话。注意有一项多余。注意：请将选项前的字母代号填在题前的横线上。

A： Could you tell me how much it costs to fly to Hainan?

B：小题1:________________

A： From Beijing.

B： 小题2:_______________is  1,000 yuan one way.

A： Could you tell me if there is a flight in the morning on November, 26?

B：小题3:_______

I have to check my computer. Yes, there is a flight at 8:15 in the morning.

A：Great!   小题4:_________

B： 小题5:___________

A：Round-trip. We’ll return on the 8 of December.  小题6:_________

B：Yes. Four tickets on November 26 “ to Haikou and returning to Beijing on December 8”.

A．The price of a ticket from Beijing to Haikou

B．Just a minute, please.

C．Where are you flying from?

D．Would you want one-way or round-trip? E. Is that possible?

F. I’d like to book four tickets, please.

G. Do you want to know more about it?

某男子与一重症禽流感患者有过接触，因而被要求进行医学隔离，该男子十分惶恐，自己注射了一定剂量的青霉素制剂。住院期间，经医生检查发现该男子体内出现了相应的抗体。但该男子除了出现体温稍高外，并没有出现其他症状。请回答下列问题：

该男子未患禽流感是不是因为注射青霉素的原因？（）。理由是（）。