根据下面的对话情景，在空白处填上一个适当的句子，使对话的意义连贯、完整。
A: You look tired. 1.______________?
B: Well, I can't stand my neighbor.
A: But what happened?
B: 2.______________. and I can't fall asleep.
A: Oh, so he did last night, right?
B: Yes. He sang with his friends until 12 o'clock last night.
A: 3.______________.
B: But I don't know what to say.
A: It's easy. Just say like this, "4.______________?"
B: 5.______________?
A: I don't think he will get mad. You should try to be polite.
B: Perhaps I should.
