B

    An old man was going home late one night with his horse and cart after a day's hard work. When he was not far away from his house, the light on the cart went out. He tried but could not repair it. He was near his home, and so he went along the road without a light. When a policeman saw this, he stopped the old man.

    "Where is your light?" asked the policeman. "No man may take a cart along the road at night without a light. You know that. You have broken the law." "I had a light, but it has just gone out," said the old man.

    "I don't believe that story. What's your name and where do you live?" asked the policeman. "Please don't write down my name," said the old man. "My home is just there. You can see it from here. I had a light nearly the whole way."

    "You came all the way without a light. What's your name?"

    The old man quickly took the policeman's hand and put it down on the top of the light. The light was still hot and burnt the policeman's hand. The policeman jumped and he was very angry. "Now, what do you think?" said the old man. "Did I come all the way without a light?"

下列混合气体，点燃时可能发生爆炸的是

①氢气和空气      ②二氧化碳和一氧化碳      ③氦气和氧气    ④天然气和氧气（　　）

    Have you ever dreamed of spending a night in a Ferris wheel? (摩天轮)Your dream may come true soon. French architects(建筑师) are planning to build a water wheel(水车) hotel on the bank of the Seine.

    The water wheel will look like the London eye. The London Eye lies in the Thames which is the world first and the third biggest wheel. The water wheel hotel's pods (吊舱) will become hotel rooms. The water wheel will be made of wood and it will have 19 pods. There will be a bathroom in each pod.

    Although sleeping in such a hotel will be very unusual, the experience isn't just for rich people. A night will only cost about 300 euros(欧元).