根据上下文语境填入恰当的句子补全下列对话。
A: Morning, Mary!
B: Hi, morning! What are you going to do this evening?
A: I'm going to the school party. 1._____?
B: 2._____. Let's bring some snacks then.
A: Oh, we can't do that.
B: 3._____?
A: If we bring snacks, 4._____.
B: Oh, I see. By the way, 5._____.
A: We can get there at 5: 00.