If you go out to the fields at night in spring or summer, you can hear frogs singing 小题1:__ (joy) here and there. It seems as if they were performing a field symphony.
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 harmful _小题2:__ crops. This little creature is regarded __小题3:_ “the natural enemy of pests”．
小题4:_ now frogs are getting fewer and fewer. This is because they are killed and put on the table as a delicious dish by their chief enemy, human beings. It is __小题5:__ shameless and cruel act, isn’ t it？_小题6:_ cause responsible for the rapid reduction of frogs is that farmers use insecticides (杀虫剂) to kill pests and frogs get killed as a result of drinking poisoned water __小题7:_ eating poison-killed insects.
Something must be done without delay _小题8:_(save) frogs. If we don’t punish those __小题9:_ sell and kill frogs to make money, then one day all of us __小题10:__(punish) by nature for failing to keep the balance of nature.
小题1:joyfully
小题2: to
小题3: as
小题4: But
小题5: a
小题6:Another
小题7: or
小题8: to save
小题9: who
小题10: will be punished
小题1:[解析] 副词修饰动词。[答案] joyfully
小题2:[解析] be harmful to“对……有害”，固定搭配。[答案] to
小题3:[解析] be regarded as“被认为是……”。[答案] as
小题4:[解析] 与上文是转折关系，且后面没有逗号，故用But。[答案] But
小题5:[解析] 根据语意“这是一种不知羞耻的残忍的行为”，可知此处应用不定冠词。
[答案] a
小题6:[解析] 上面讲到的“吃”青蛙是它数量减少的一个原因，这里是“另一个”原因。
[答案] Another
小题7:[解析] (另一个原因是)青蛙喝了有毒的水，或者吃了被毒死的昆虫。二者是选择关系。 [答案] or
小题8:[解析] 为了保护青蛙，要刻不容缓地采取行动。不定式表目的。
[答案] to save
小题9:[解析] 定语从句，由于先行词是those，指人，故用who引导。[答案] who
小题10:[解析] 根据语境此处用一般将来时的被动语态。
[答案] will be punished