A

    Mr. and Mrs. Bell are very forgetful. For example, Mr. Bell sometimes goes to work on Sunday morning, for he thinks it is Monday. And Mrs. Bell sometimes forgets to cook supper for the family.

    One summer, they planned to fly to New York for their holidays. They got to the airport only ten minutes before the plane took off. So time was short. But suddenly Mrs. Bell said she must tell Alice, their daughter, not to forget to lock the front door when she went to school. As Alice was then at school, they couldn't tell her about it by telephone. So they hurried to the post office. Mrs. Bell wrote a short note to Alice when Mr. Bell bought a stamp and an envelope(信封). Soon the note was ready. They put the stamp on the envelope in a hurry and dropped the envelope into the letter box, but suddenly Mrs. Bell began to cry. The short note was still in her hand. She had put the plane tickets in the envelope.

    Once, Einstein gave a lecture in a university. After his speech, the audience started asking questions.

    A girl asked, "Do you think you're a giant of science？" Einstein said with a smile, "A giant is a person who is tall in height. You see I'm so small, how can I be a giant? Maybe I see a bit farther, only because I stand higher！"

    Then a boy asked, "You mentioned you stand higher than the others. It reminds me that you had a talk with a lady on the top of the Alps (阿尔卑斯山).I don't want to ask what you talked, but I want to know whether you realised you have been a top in the history of science when you stood on the top."

    Looking at the boy carefully, Einstein replied, "Well, my height cannot become a top. And there is no top that no one can get to, so we don't want to be a top, but we want to be a person to climb the top！"

    Then he took up a piece of chalk and wrote on the blackboard, "Standing on the top, you are not tall, but even smaller！"

    Then he said, "Though I stand tall, in the eyes of the world I'm still small! Finally, I can tell you a sentence, which was the last one I told the lady on the top of the Alps, 'Any top can be reached, for there is no giant in the world but the one who stands higher！'A storm of applause(掌声) sounded. The lady who listened to Einstein's instruction on the Alps that year was no other than Madam Curie!

    One Sunday, Jim went to town to buy new clothes. First he tried on a sweater. He didn't like it, so he returned it to the storekeeper. Then he tried on a T-shirt that had the same price as the sweater. Jim was satisfied with the T-shirt, and he left the store with it. Before he climbed on his horse to go home, the storekeeper and the assistant ran out at the same time.

    "You didn't pay for the T-shirt!" said the storekeeper.

    "But I gave the sweater in exchange for the T-shirt, didn't I?" replied Jim.

    "Yes, but you didn't pay for the sweater!" said the storekeeper.

    "But I didn't buy the sweater." said Jim,

    "I am not so stupid to pay for something that I have never bought."