Bob：Laura，what happened to you? You look a mess

Laura：And I feel even worse than I look.I had a bad fall off my bike.

Bob： how did it happen?

Laura：i was riding along the road when a dog began barking at me .I turned to have a

look，and I bumped into another bike.

Bob：Then what happened? Did the dog attack you?

Laura：Let me finish… I’ll give you all the details. I went off the front of my bike and

landed on the road.I hurt my head when I landed.

Bob： You could have been hit by a car!

Laura：Fortunately there were no cars on the road at the time.1 was lucky.

Bob：The dog was to blame.

Laura：But I can’t blame the dog.All dogs bark.

Bob：You should be more careful in the future .

Laura：Sure.you are right.I may be hard-headed but I’m not thick-headed.