请写出下列对话正确的排列顺序。
a. That's too bad! I hate getting on a crowded bus. It's going to rain, isn't it?
b. Yes, it is. Do you think it'll be crowded on the bus?
c. I hope not! But it's usually crowded at this rush hour.
d. Me, too. But at least it isn't raining now.
e. Yes. It looks like rain. But I forgot my raincoat.
f. The bus is always late, isn't it?
排列顺序：
