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 (殺蟲劑) 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.

 

【答案】

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]　副詞修飾動(dòng)詞。[答案]　joyfully

2.2】[解析]　be harmful to“對(duì)……有害”，固定搭配。[答案]　to

3.3】[解析]　be regarded as“被認(rèn)為是……”。[答案]　as

4.4】[解析]　與上文是轉(zhuǎn)折關(guān)系，且后面沒有逗號(hào)，故用But。[答案]　But

5.5】[解析]　根據(jù)語意“這是一種不知羞恥的殘忍的行為”，可知此處應(yīng)用不定冠詞。

[答案]　a

6.6】[解析]　上面講到的“吃”青蛙是它數(shù)量減少的一個(gè)原因，這里是“另一個(gè)”原因。

[答案]　Another

7.7】[解析]　(另一個(gè)原因是)青蛙喝了有毒的水，或者吃了被毒死的昆蟲。二者是選擇關(guān)系。[答案]　or

8.8】[解析]　為了保護(hù)青蛙，要刻不容緩地采取行動(dòng)。不定式表目的。

[答案]　to save

9.9】[解析]　定語從句，由于先行詞是those，指人，故用who引導(dǎo)。[答案]　who

10.0】[解析]　根據(jù)語境此處用一般將來時(shí)的被動(dòng)語態(tài)。

[答案]　will be punished

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