Question

13．词汇应用
Space vegetables are grown from seeds （种子）that have been taken to space．When they （1）are brought（bring ）back to the earth．These seeds produce vegetables that are bigger and （2）healthier（healthy） than normal （正常的）vegetables．But some people worry about （3）having（have） space vegetables．They think that space vegetables might not be good for us and could make us（4）get（get ）sick because of the radiation in space．However，people should not be afraid because space vegetables are very healthy．Here are some facts that you should know about space vegetables．
Space vegetables are grown from seeds that are （5）carefully（care） chosen．When seeds are brought back from space，they are tested to make sure that they will be safe （6）to eat（eat）．
Space vegetables are （7）better（good） for you than normal vegetables．For example，space（8）tomatoes（tomato）stay fresh for twenty days，which is one week longer than normal tomatoes．
After genetically modified （转基因）food （9）appeared（appear）in the market，people worried that they were eating （10）unknown（know ） things．For example，if nut genes （坚果基因） are put inside potatoes，people allergic （过敏的） to nuts might get sick from eating these potatoes because they do not know they are also eating nuts．Unlike genetically modified food，nobody （11）has done（do ）anything with the genes of space vegetables until now．This （12）means（mean） that no new genes are put into them．So there is no risk of eating something unknown．

Answer 1

分析 文章介绍了太空蔬菜的种植过程，它比正常的蔬菜更健康，但一些人还是担心吃了会对他们不好．文章最后一段说明了吃太空蔬菜并没有什么危险，让人们不要担心．

解答 1．were brought 考查被动语态．bring与they（指的是space vegetables）间是动宾关系，当they作主语时要用被动语态，结构为be动词加过去分词．此处的they是第三人称复数，且时态是一般现在时，be动词要用are，再加上bring的过去分词即可．
2．healthier 考查形容词的比较级．由than可知此处要用比较级，healthy的比较级是healthier．
3．having 考查固定搭配．about是介词，它后面的动词要用动名词形式，所以填have的动名词形式即可．
4．get 考查固定搭配．make sb do…表示使某人做…，此处表示可以使我们生病，填get的原形即可．
5．carefully 考查副词．分析句子可知此处修饰动词chosen，修饰动词要用副词，且句意为太空蔬菜是由仔细挑选的种子长大的，用carefully表示仔细地．
6．to eat 考查固定搭配．be safe to do表示做…安全，此处表示吃起来安全，填eat的不定式形式．
7．better 考查形容词的比较级．由than可知此处要用比较级，good的比较级是better．
8．tomatoes 考查名词．空格处作主语，且tomato是可数名词，谓语动词stay用的原形，由此可知主语要用复数形式，填tomato的复数．
9．appeared 考查时态．由worried可知时态是一般过去时，所以此处的谓语动词要填appear的过去式．
10．unknown 考查形容词．由because they do not know they are also eating nuts与So there is no risk of eating something unknown可知此处表示的是人们担心他们吃着未知的东西，用形容词unknown修饰名词things．
11．has done 考查时态．由until now可知时态是现在完成时，主语nobody是不定代词，所以助动词have要用三单形式has，再加上do的过去分词．
12．means 考查主谓一致．由no new genes are put into them可知时态是一般现在时，主语this是单数指示代词，谓语动词要用三单形式，填mean的三单形式．

点评 考查平日语法知识的积累，注意人称时态和名词的数的变化，并结合语境来用所给词的正确形式填空，注意上下文间的逻辑关系是解题关键．