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. ________________________ ?
A: I'd love to. But do you think it's going to rain tomorrow?
B: __________________________________. Look, there isn't any cloud in the sky.
A: I hope it will be fine tomorrow. ___________________?
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. ______________________________________.
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. ____________________________________ .
B: OK. Goodbye.
A: Bye-bye.
Keep your hair away from fire， Lucy．
I see， mum． Hair fire easily．
Is this your English book？
No， it isn't． is in my schoolbag．
Does your PE teacher teach you Chinese kung fu？（改为被动语态）
you Chinese kung fu by your PE teacher？
Let's discuss who we'll choose as the new chairperson of the organization．（改为简单句）
Let's discuss choose as the new chairperson of the organization．
The boy is very clever．He can work out difficult problems．（合并为一句）
It is very clever the boy work out difficult problems．