题型：语法填空（语篇） 题类：常考题 难易度：困难
黑龙江省大庆铁人中学2018-2019学年高一下学期英语开学考试试卷
If you go out to the fields at night in spring or summer, you can hear frogs singing （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 harmfulcrops. This little creature is regardedthe natural enemy of pests".
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 shameless and cruel act, isn't it?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 watereating poison-killed insects.
Something must be done without delay（save）frogs. If we don't punish thosesell and kill frogs to make money, then one day all of us （punish） by nature for failing to keep the balance of nature.
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