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.