题目

若点（a，－9）在函数y＝－x2的图象上，则a的值为  (  )     A．3            B．－3          C．±3          D．±81 答案：COnce there was an old man in a town. He always forgot a lot of things. So his wife always had to say him, “Don’t forget this” One day he went on a long trip alone. Before he left home, his wife said, “now you have all these  things . They are what you need for your trip. Take care of your things during the trip.” He went to the station, bought a ticket and go on the train with it. About half an hour later, the conductor began to see the tickets. He came to the old man and said. “Will you please show me your ticket ?” the old man looked for his ticket in all his pockets, but he could not find it. He was very worried. “I can’t find my ticket, I really bought a ticket before I got on the train” said the old man. “I believe you bought a ticket. All right  , you don’t have buy another one” said the conductor kindly.  “But how can I know where I’m going? I can’t remember my station!” the old man said sadly 1.The old man in the story was very ______. A. kind    B. poor    C. forgetful    D. sad 2.The old man bought the ticket ______ he got on the train. A. after   B. before    C. until   D. when. 3.The conductor _____ the old man. A. didn’t believe  B.  laughed at  C.  believed     D. felt sorry for 4.The old man was sad because____ A. he had to buy another ticket B. he lost all the things his wife gave him C. he did not know where he was D .he did not know where he should get off.