A

    What picture do you have of the future? Will life in the future be better, worse or the same as now? What do you hope for about the future? Scientists think that life will probably be very different in 2050.

    First of all, it seems that people won't use TV channels by 2050. Instead, people will choose a program from a "menu" and a computer will send the program directly to the television.

    Water will become a very serious problem. We'll need much more water, but there won't be enough. Some scientists think that water would be the cause of war.

    Cars will run on new clean energy and they will go very fast. And there won't be any accidents with the help of computers. On the other hand, space planes will take people around the world in two hours.

   Robots will work in factories instead of people. Many factories have already used robots. Big companies prefer robots—they do not ask for money, and they work for 24 hours a day.

    In a word, by 2050, our life will change a lot and our future will be quite different from now.

物体M的重力所做的功率P

阅读下面短文，从短文后各题所给的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项。

    There was a small boy living on a farm which seemed so far away from everywhere. He was1 to get up before sunrise every morning to start his work and to go out again later to work in the evening.

    During sunrise he would take a 2and climb up on a fence, so in the distance he could see a house with golden3. He thought how4it would be to live there and began to5the modern equipment that might be6in the house. He thought, “If that is a house with golden windows, then there7be other nice things in the house.”8, he promised himself, “Some day I will go there and see this wonderful place9.”

    Then one morning his father told him to stay at home as his father would do the work. Knowing that was his10, he packed a sandwich and11across the field towards the house with golden windows.

    12 the afternoon going on, he began to realize how he had misjudged the distance.13, something else was wrong. As he came14to the house, he saw15golden windows but a place16by a broken fence which badly needed17. He went to the door and knocked. A small girl opened the door.

    He asked the girl if she had seen a house with golden windows. “18,” said the girl and invited him to sit on the porch (门廊). As he sat there, he looked19. There the20turned the windows of his home golden.