词汇应用

Space vegetables are grown from seeds （种子）that have been taken to space．When they （1）　_　（bring ）back to the earth．These seeds produce vegetables that are bigger and （2）　_　（healthy） than normal （正常的）vegetables．But some people worry about （3）　　（have） space vegetables．They think that space vegetables might not be good for us and could make us（4）　　（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）　　（care） chosen．When seeds are brought back from space，they are tested to make sure that they will be safe （6）　　（eat）．

Space vegetables are （7）　　（good） for you than normal vegetables．For example，space（8）　　（tomato）stay fresh for twenty days，which is one week longer than normal tomatoes．

After genetically modified （转基因）food （9）　　（appear）in the market，people worried that they were eating （10）　　（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）　　（do ）anything with the genes of space vegetables until now．This （12）　_　（mean） that no new genes are put into them．So there is no risk of eating something unknown．