根据对话情景，在空白处填入合适的句子。
A: Hi, Li Dong! Tomorrow is Saturday. __1__
B: Well, we have decided on one thing, We're going to the Great Wall for a picnic.
A: Oh. Sounds great! __2__
B: We're going there by bus.
A: __3__
B: Everyone should wear sports shoes.
A: When and where are you leaving?
B: We're leaving at the bus stop at 6:00 tomorrow morning.
A: __4__
B: We're going hiking.
A: __5__
B: For a whole day. We'll be back at 4:50 in the afternoon.
A: Well, have a good time! Show me your photos when we get back to school.
B: Thanks. I will.
