在生产和生活中，使用最多的金属材料是       （     ）

    (D)

    How to talk to someone you don't know? It depends on the situation(情形).

    If one of your friends introduce you to a new friend, it would be OK to start talking about the person who introduces you. You may ask him/ her how they knew each other. Show you are interested in it, even if you aren't. Nod after he/ she talks. This will give you more time to listen to what he/ she says, and think about next question from his/ her talking.

    Now if you go to a class on the first day where you do not know anyone, the first thing you should remember is not to be shy when talking to other people. You may remember when you were in the first or second grade, someone would just walk up to you and talk to you. Be open, but think before you talk.

    When it comes to meeting people face to face for the first time, find a situation which both of you are in. Maybe you are sitting next to each other. Maybe the other person says something you don't understand. Find a situation that seems proper (恰当的). Start with a simple conversation. It may seem strange at first. But the more you talk and take action with them, the more they will like you.

阅读理解

C

    Nowadays more and more people like to travel, especially when vacations come. A great number of people rush out of their homes or companies to travelling spots. They either drive or take a bus, a train, a ship and so on. Some even ride bikes.

    However, there is another way of travelling—poorism. People have a tour in the poorest areas of the world. Some people may take one-day poorest tour, and some even pay to stay in very poor neighborhoods to experience the lowest living standards in the world. Poorism tours take place around the world, and not just in the third world countries. You can, for instance, tour New York neighborhoods in the Bronx, in the Bund of Shanghai. Such tours can take people into the heart of poor areas within large and in some rich cities. These tours may awaken people to pay more attention to long-standing poverty, or the effects of war.

    Some suggest that tours in the poor areas can raise social care. And the money from the tour can be donated to help the people there.

生物进化的规律是从单细胞到多细胞，从____，从____，从____．

读2011年我国能源消费结构的预测图，回答题。