Question

【题目】Ifyougoouttothefieldsat night in spring or summer, you can hear frogs singing【1】(joy) here and there. It seems as if they were performing a field symphony（交响乐）.

The frog is a good and useful creature that benefits human beings. They can catch fast-moving insects. Each frog eats a large number of pests that are 【2】harm) to crops. This little creature is regarded 【3】“the natural enemy of pests”.

【4】, frogs are getting fewer and fewer now. This is【5】they are killed and put on the table as a delicious dish by their chief enemy, human beings. It is a shameless and cruel act, isn’t it? Another reason responsible for the rapid reduction of frogs is 【6】farmers use insecticides (杀虫剂) to kill pests and frogs get 【7】(kill)as a result of drinking poisoned water or eating poison-killed insects.

Something must be done without delay 【8】(save) frogs. If we don’t punish those 【9】sell and kill frogs to make money, then one day all of us 【10】(punish) by nature for failing to keep the balance of nature.

Answer 1

【答案】

【1】joyfully

【2】harmful

【3】as

【4】However

【5】because

【6】that

【7】killed

【8】to save

【9】who

【10】will be punished

【解析】试题分析：青蛙是益虫，是人类的好朋友。它会帮助人类吃掉很多害虫，但现在青蛙的数量越来越少。文章中分析了这一现象的原因。

【1】joyfully 考查副词。在英语中通常使用副词做状语修饰动词、形容词或副词。本句中使用副词joyfully修饰动词sing。

【2】harmful 考查形容词。英语中系动词通常和形容词连用构成系表结构，所以本句中使用形容词harmful和系动词are构成系表结构。句意：每只青蛙都可以吃掉很多对庄稼有害的害虫。

【3】as 考查固定短语。短语regard....as.....认为...是...；本句是其被动语态。句意：青蛙这种生物被认为是害虫的天敌。

【4】But 考查上下文串联。在第一段中作者叙述了青蛙对人类的巨大作用，但青蛙的数量在逐年变少。上下文之间存在转折关系，所以使用表示转折关系的连词“but”联系上下文。

【5】because 考查上下文串联。前一句告诉我们青蛙的数量越来越少，本句解释具体原因。所以使用连词because引导表语从句，表示原因。

【6】that 考查名词性从句。本句中that引导表语从句解释青蛙变少的另外一个原因，意为主语是the reason，所以使用that而不能用because。

【7】killed 考查固定搭配。短语“get+过去分词”可以表示被动也可以表示状态。很多青蛙由于喝了有毒的水或吃了有毒的昆虫而被杀死。

【8】to save 考查不定式用法。本句中不定式短语在句中充当目的状语。句意：我们要离开采取措施来挽救青蛙。

【9】who 考查定语从句。本题定语从句的先行词是指人的代词“those”，关系代词who指代先行词在句中做主语。

【10】will be punished 考查时态语态。if条件状语从句中使用一般现在时代替将来时，主句使用将来时。且本句主语all of us与动词punish构成被动关系，所以使用一般将来时的被动语态。