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.