Question

If you go out to the fields at 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.

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 _2.__ crops. This little creature is regarded __3._ “the natural enemy of pests”．

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 __5.__ shameless and cruel act, isn’ t it？_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 __7._ 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.joyfully

2. to

3. as

4. But

5. a

6.Another

7. or

8. to save

9. who

10. will be punished

【解析】

1.[解析] 副词修饰动词。[答案] joyfully

2.2】[解析] be harmful to“对……有害”，固定搭配。[答案] to

3.3】[解析] be regarded as“被认为是……”。[答案] as

4.4】[解析] 与上文是转折关系，且后面没有逗号，故用But。[答案] But

5.5】[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

6.6】[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

7.7】[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

8.8】[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

9.9】[解析] 定语从句，由于先行词是those，指人，故用who引导。[答案] who

10.0】[解析] 根据语境此处用一般将来时的被动语态。

[答案] will be punished