阅读理解。 The story is told about two people named David and Rosy Jackson. Both of them had very bad memory. For example, Rosy would forget to cook dinner，or David would go to work on Sunday，thinking it was Monday. One winter they were to take a long plane trip. When they arrived at the airport, there was ten minutes left.In that situation(情况) anyone would get into the plane right away.But Mr. and Mrs Jackson didn’t do so. They went to buy the travel first. After they put a two-pound note into a machine , their insurance policy came out.'Who would get the money if the plane crashed, I wonder?' asked Rosy.'My mother，of course. ' her husband replied. 'We'll post the policy to her. ' Now be quick give me a stamp,will you?' He said. 'The plane is going to take off in a minute. ' David put the stamp on the  envelope, dropped it into a postbox. And suddenly he let out a cry. What do you think happened to him? He had posted their plane tickets to his mother. 1. This passage tells us that David and Rosy . A. were always short of time B. always did everything in a great hurry C. were very forgetlul D. usually worked on Sunday 2. According to the passage, what does the 'insurance' mean in Chinese? A. 飞机票 B. 保险 C. 饮料 D. 纪念物 3. David wanted to post his mother . A. the travel insurance policy B. a two-pound note C. two plane tickets D. an empty envelope 4. Mr Jackson made such a foolish mistake because . A. he was worried about his mother B. he had forgotten to bring a stamp C. he was worried about this flight D. his memory was poor and he was in a hurry