1. produce fuel 2. four main areas

　　3. a possible solution 4. look at the oil crisis

　　5. alternative energy sources 6. fossil fuels

　　7. harnessing of wind and waves 8. human and animal waste

　　9. conversion of plant material 10. a large agriculture sector

　　11. possibility of using 12. in the production of alcohol

　　13. has fallen dramatically 14. in the last decade

　　15. dependent on 16. using their sugar

　　17. relatively economical 18. other starchy plants

　　19. in tropical countries 20. corn and sugar beet

　　精析：

　　考生在快速预览该篇文章后，尤其是在预览主题句后，便对其含义有总体印象，它是关于the competition for land use的短文。与此同时，考生可对部分填空题目作出大致的推断。这样，考生在听的同时，将预测信息与听到信息有机结合起来，便可作出正确判断。若遇同音词可以根据语义和语法规则进行判断。最后，若有个别词或短语尚未听懂，考生可根据文章上下文的连贯性和平行性(coherence and parallel)，语义的(semantic)一致性(consistency)，以及语法规则(grammatical rule)的准确性(accuracy)来猜词悟意，直至篇章完善。

　　1)由主题句猜测篇章大意也必不可少。该篇文章开头句就提到：“Today I‘m going to consider very briefly a problem concemed with the competition for land use，that is，whether crops should be used to produce food or should used to___ (1)and．．．”。由此看出，本文是讲述作者对土地使用目的的研究，庄稼是用来生产食物，还是用来生产燃料。文章第二、第三、第四和第五自然段是对主题的展开论述。由第二自然段的首句“In considering the historical background we should ___(4)of the l970s due to the rapid trend in increasing oil prices．”，便可知该段是说“能源危机的历史状况”。由第三自然段的首句“Aparticularly interesting possibility for many developing countries has been the__ (9)to alcohol．”，便可知该段是说“发展中国家利用农业资源的状况”。由第四自然段的首句“Research is。going on ___(12)，for example，from sugar and there two main economic reasons for this．”便可知该段是说“农业资源生产的经济原因”的情况。最后一段，由“In addition to sugar there are____(18)that can be used to make alcohol，．．．”中的“In addition to”，考生便可推断出作者又进一步论证除蔗糖以外的情况。掌握中心是考生第一关键。

　　2)预测信息，猜词悟意。考生在对文章有了总体印象后，可在脑海中预测一些信息，同时可根据上下文的连贯性猜词悟意。，如“Today I‘m going to consider very brieflv a problem

　　concerned with the competition for land use；that is，whether crops should be used to produce food or should be used to ___ (1)．．“由句中”whether crops should be used to produce food'‘，考生便可猜出(1)这一空格会出现平行的“produce"一词。当考生听音时会有的放矢，很容易就会听出这一信息"produce fuel"。万一考生在听音时没有听清”fuel'’一词，考生可根据下文关于能源的内容，进行猜测。

　　3)遵循语法，完善句子。当考生对一些音素可能听得不很清楚时，如“．．．and in considering this problem I will look at___(2)：”句中的第(2)空格"four main areas"究竟是“for"还是”four“，可根据语法知识和语义内容作出正确判断。该句的下半句”．．．the historical background to the problem，the economics involved in the competition for land US，some examples，and__(3)to a potential problem．“正好反映了4个主要方面，因此该词