根据下面的对话情景，在每个空白处填上一个适当的句子，使对话的意义连贯、完整。
A: My God! It's nearly 7:30.
B: Hurry up, Dad. I have had my breakfast and 1.____________________________.
A: I will be late for work if I take you to school. Can't you walk there today?
B: But 2.__________________________! It will take me forty minutes.
A: But you know, walking is as important as eating and sleeping.
B: But 3.__________________________, if I spend too much time on walking.
A: It can also make you strong. 4.___________________________, I spent more than an hour walking to school
every day. Off you go, Peter!
B: Bye-bye! But you'd better remember to 5.____________________________, Dad.