A、Mark Twain was very hot-tempered. B、The conductor was quite careless. C、The service on the train was bad. D、The man who was pu

Mark Twain, the famous American writer, was once traveling in France. He went by train to Dijon. He was very tired and wanted to sleep. Therefore, he asked the conductor to wake him up when the train came to Dijon.
    But first he explained that he was a very heavy sleeper. "I may possibly protest loudly when you try to wake me up," he said to the conductor, "but don’t take notice, just put me off the train any way. "
    Then Mark Twain went to sleep. Later, when he woke up it was night-time and the train had reached Paris already. He realized at once that the conductor had forgotten to wake him up at Dijon. He was so angry that he ran up to the conductor and began to shout at him.
    "I have never been so angry in all my life. " Mark Twain said. The conductor looked at him calmly. "You are not half as angry as the American whom I put off the train at Dijon," he said.
Q:
16. What did Mark Twain ask the conductor to do?
17. Why was Mark Twain very angry at the conductor?
18. What can you infer from the passage?