The United Nations Food and Agriculture Organization(FAO)  is urging farmers to pay attention to trans-boundary(跨界) animal diseases. Officials warn that pests can spread quickly from one country to the next.

Experts from across Africa say trans-boundary diseases kill between 10 and 20 percent of the  animals every year. The experts gathered in Cameroon last month to discuss the problem. They suggested large vaccination （接种）and pest eradication（根除） programs to stop the spread of the diseases.

Dr. Taiga is Cameroon's livestock minister. He says pests like nose bot flies(马鼻蝇)and wool maggots(肉蝇蛆 ) are harming animals in some communities in his country.

Dr. Taiga says all animals in an area must be killed if one animal is affected because the diseases are infectious（传染性的）. They spread quickly from animal to animal. He says that is why the FAO and the World Organization for Animal Health are working together to destroy the diseases. He says that when central African countries succeed in killing the pests, their human populations will enjoy better quality protein.

Pests can spread diseases and also cause health problems known as secondary infections. Some infections cause the animals to become very tired. They may not eat. Then they die.

Dr. Felix Njemi is an animal health officer at the FAO. He says the large number of animal deaths makes food crisis worse in Africa, especially in countries south of the Sahara.

Many poor people in African countries depend on goats and sheep for their livelihoods. The FAO says people become weak to famine （饥荒）when pests attack and kill their animals.

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1.What are trans-boundary animal diseases?

A Animal diseases that farmers should pay attention to.

B Animal diseases that kill 10 to 20 percent of the continent's animals every year.

C Animal diseases that spread from one country to another.

D nimal diseases that always take place between countries.

解析：选C。细节理解题。由第1段第2句可知，trans-boundary （跨境）…spread quickly from one country to the next, 故C为最佳选项。

2.Experts want to______to stop the spread of trans-boundary animal diseases.

A use vaccination and pest eradication

B urge farmers

C kill the infected animals

D attack and kill the animals

解析：选A。细节理解题。由第2段第3句可知，专家们考虑的，阻止跨境动物疾病传播的方法：是接种疫苗和根除害虫（传播疾病），故A为最佳选项。

3.According to Dr. Taiga, what should people do if one animal is infected with disease in an area?

A Kill the infected animal immediately.

B Kill all the animals in that area.

C Destroy the disease.

D Kill the pests.

解析：选B。细节理解题。由第4段第1句可知，对动物感染病症的地区处理方法，专家的建议是：只要有一头动物感染，该地区所有的动物都应捕杀all animals in an area must be killed if one animal is affected，故B为最佳选项。

4.The underlined word “protein” in paragraph 4 probably means______.

A 蛋白质

B 食物

C 动物

D 猪肉

解析：选A。词义猜测题。protein本义为蛋白质，当中非国家成功消灭害虫，这里的人们就能享受到更优质的蛋白质，故A为最佳选项。

5.What might be the final result if people fail to stop the spread of animal diseases?

A People will have to depend on goats and sheep.

B The pests will attack people.

C A large number of animals will die.

D People will suffer from starvation.

解析：选D。推理判断题。如果动物疾病传播防止失败，当然最终的结果就是影响人们的生活，非洲本身食物溃乏，动物死亡会加剧灾情，所以人们有遭受饥荒的危险（D选项）。