根据上下文，补全对话。
A: Good ____.
B: Good morning.
A: Can I ____ you?
B: Yes. May I ____ a blouse, please?
A: OK. Here ____ are.
B:____ you.
①抗体与抗原结合
②消化道中蛋白质分解成氨基酸
③丙酮酸分解成二氧化碳和水
④乳酸与碳酸氢钠作用生成乳酸钠和碳酸
⑤胰高血糖素的合成
⑥神经递质与受体结合．
我国铁路干线中，京广线与浙赣线﹣湘黔线相交的铁路枢纽是（ ）
We arrived at the station too early and had ___________ to go, so we sat there and chatted with each other.
