题目内容
Wang Wei is good running. He thinks it is good his health.
A. for;at B. at;for C. at;to
B
【解析】
试题分析：句意：王伟擅长跑步。他认为这对他的健康有好处。Be good at擅长某事；be good for对……有好处。故选B。
考点：考查介词固定搭配
名校课堂系列答案The population problem may be the greatest one of the world today. The world’s population is growing faster and faster. Two thousand years ago, there were only 250 million people on the earth. Four hundred years ago, the number was over 500 million. But at the beginning of the 20th century, the world’s population was about 1,700 million. In 1970, the number was3,600 million. In 1990, the number was five billion. A UN report said that the world population had passed six billion by the end of the 20th century. This was just ten years after it reached five billion. By October 31, 2011, with a new baby’s birth, the world’s population has reached 7 billion. But another billion is coming by 2025, and the total will reach 10 billion before the end of the century.
根据短文内容，完成下列各题。每空填一词。
Time | World’s population |
Two thousand years ago | There were only ____1.___ million people on the earth. |
Four hundred years ago | The number was ____2.___500 million. |
At the __3._____of the 20th century | The world’s population was about 1,700 million. |
By the end of the 20th century | The world population had __4._____six billion |
By the year of 2025 | The world’s population will be ___5._____ billion. |