题目内容
5．Climate change has caused a rise in sea levels．This has increased the amount of salt in fresh water（66）used（use）on coastal farms．As a result，farmers are（67）gradually（gradual） unable to use fields close to the sea．However，Marc Van Rijsselberg，a farmer in the Netherlands is now using a（68）mixture（mix）of sea and fresh water（69）to grow（grow） healthy and tasty vegetables．
He teamed up with scientists from the Free University and divided a farm（70）intoeight negated areas．Separate pipes pumped fresh and sea water，and a computer program created water with eight levels of salinity（含盐度）．
The water levels and the levels of salinity was（71）controlled（control） by computerized measuring devices called"sensors"．Mr．Van Rijsselberg said he was able to harvest vegetables from most of the eight testing areas．He said the vegetables were smaller than （72）thosegrown in fresh water．But he said they also had more sugar and salt，so they tasted much（73）better（good）．
He found that potatoes grew better than the other vegetables in the combination of sea and fresh water．Mr．Van Rijsselberg said four kinds of these potatoes would be sent to Pakistan（74）wherethousands of hectares of land （75）was damaged（damage） by salinization last year．
分析 本文写了气候的变化使海水的含盐量过高，对于种植业的影响．
解答 66．used 考查非谓语．过去分词作定语．意思是"在海边农场上被使用的淡水含盐量过高"．
67．gradually 考查副词．此处"逐渐地"要用副词形式．
68．mixture 考查词形变换．mixture混合物．
69．to grow 考查 动词不定式．动词不定式作目的状语．意思是"为了种植可口的蔬菜"．
70．into 考查介词．divide sth．into…意思是"把某物分割成…"．
71．controlled 考查被动语态．意思是"灌水量和水的含盐量是被电脑控制的"．
72．those 考查指示代词．those指的是前面的the vegetables这个词．
73．better 考查形容词的比较级．此处意思是"这些蔬菜尝起来更好"．
74．where 考查定语从句．此处where引导的是一个定语从句，先行词是Pakistan．在定语从句中做地点状语，所以用关系副词where来引导．
75．was damaged 考查被动语态．此句意思是"很多土地被毁"，所以要用被动语态．另外，根据时间状语last year，此句要用一般过去时态．"土地"被毁是发生在"过去，去年"，并不强调"土地被毁"发生在"那个科学家说要送土豆至巴基斯坦"之前，所以不用过去完成时态．
点评 语法填空题是考查学生的语言运用能力．解题时，要在理解文章的基础上，灵活运用语法知识，如词性，时态，名词单复数，连接词，代词，冠词等判断空白处应填写的内容．答完后，还要通读全文，核对所填单词形式是否正确，是否符合语境．
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