Harry Marsh was a driving examiner. He used to test people who wanted to get a driving license.

One day he came out of his office as and saw a car at the side of the road, with a young man in it. He got into the car  .  the driver and told him to check the lights, then the brakes and then all the other usual things.The driver performed everything faultlessly（完美地）,  . saying a word.

Then Harry told the driver to   his engine and drive forward. Then he told him to turn right into a side road, stop,go backwards into  side road and then drive to the office again.

On the way, the driver said to Harry politely,"Could you please tell me  .  we are doing all these things? I was passing through this town and only stopped to look at my map."