阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卡标号的相应位置上。

    Although most people believe that formal schooling is required for scientific success, a college degree is not always necessary. ____excellent example of a man who won fame as a scientist ____academic(学术的) training is Vincent J. Schaefer. His formal education ended ____ two years of high school when he had to go to work in an untrained job at General Electric. Because ____ his inventive mind and his skill as a model maker, he was soon allowed to try his own experiments in the company laboratory. His natural ____(curious) made him wonder about clouds. He developed, after many tries, a method of making clouds rain ____they would not normally do so. This method, ____(call) seeding, has been very ____(help) to farmers, and ____made him win much fame.

    Schaefer believes that for people____, most of all, are interested in the world and everything in it, a college degree is unnecessary.

白居易的《琵琶行》中江头送客时写萧瑟秋景，夜晚在浔阳江头送客人，秋风吹着枫叶和荻花，传来瑟瑟之声。为全诗渲染悲凉气氛， 奠定基调的诗句是____，____。