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【简答题】
听下面一段材料，回答第1-4小题。 1. Who gave the news on the Hour? A. The mayor in Miami. B. Ed Wilson C. Mick Jagger. 2. Who will start their ten-nation tour next month? A. The President and First Lady. B. Some Chinese scientists. C. The leader of the teacher’s union. 3. What do you know according to the news in Miami? A. A peaceful way will soon be found. B. The teachers’ strike will last long. C. Students haven’t been to school for two weeks. 4. What does the news about health tell us? A. No one should drink more than two cups of coffee a day. B. The more coffee people drink, the more chance they’ll get to have heart disease. C. Women who drink more than two cups of coffee a day are more likely to have heart disease.
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【单选题】By the end of next year they ____ together for twenty years.
A.
will have worked
B.
had worked
C.
would work
D.
have worked
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A.
一年
B.
二年
C.
三年
D.
四年
【简答题】边际收益递减规律发生作用的一个重要前提条件是____。