根据下面的对话情景，在每个空白处填上一个适当的句子，使对话的意思连贯、完整。
A: Hi, Mary. Are you going to visit Beihai Park tomorrow?
B:Yes.We'lls tart at 7:50. 小题1:________________________ ?
A: I'd love to. But do you think it's going to rain tomorrow?
B: 小题2: __________________________________. Look, there isn't any cloud in the sky.
A: I hope it will be fine tomorrow. 小题3:___________________?
B: Not far. It'll take us half an hour. It's only 5 bus stops.
A: You mean we'll go there by bus, is that right?
B: Yes. 小题4:______________________________________.
A: But I'd like to go there by bike. At that time the streets are very busy. Buses can't go faster than bikes.
B: I agree with you. Going by bike can save both time and money.
A: Yes. 小题5:____________________________________ .
B: OK. Goodbye.
A: Bye-bye.
合同的矩阵是