If you ever want to take a ride in a car or bus powered by soybeans, you can. The Agriculture Research Center (ARS) National Visitor Center bus, which is used for Beltsville, Maryland farm tours, is running on biodiesel fuel.

　　ARS scientists are conducting biodiesel fuel research, and they are trying to find ways to make fuel from vegetable oils, animal fats, and used restaurant oils.

　　Biodiesel fuel costs more than regular diesel fuel. However, the price may drop if people use it more. We can look to the future with the hope that clean fuel sources will continue to be widespread in the United States and even around the world.

　　完成句子：根据所给汉语完成下列句子，词数不限。他受到的全部学校教育加起来不超过一年。His whole schooling ____________________only one year.

　　4. 到达山顶时，观众就能体验到一种幸福感和成就感。

　　____________________ the top of the mountain, a feeling of happiness and a sense of achievement will be experienced.

　　5. 我正在路上飞速行驶就在那时一位警察冲我打手势，提醒我注意限速标志。

　　I was driving fast on the road when a policeman_____________ me, reminding me of speed limit sign.

　　一、知识复习

　　（一）词汇部分

　　1.【参考答案】①移交②发表③释放

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