A
Every summer，the Serengeti plains of Africa are worth visiting.Millions of wild animals begin their 1，800mile journey northwards on their annual migratory (迁移的) route.
In the month of November，polar bears in their thousands cross the Canadian Arctic，as they head towards the ice sheets of Hudson Bay.The sea ice that forms every winter is the key to the bear's managing to exist，for here they hunt for seals (海豹)．
The Great Bustard，one of the heaviest flying birds，migrates each year across Europe and Asia to its wintering grounds.Unluckily，these and other migratory animals are in danger from human activity.
We have written several articles on climate change and the effect of rising ocean temperatures.Since 1979，ice sheets in the Arctic have gone down by 30 percent.What does this mean for polar bears？They are forced to stay on land for longer periods of time，
which delays their search for food.As a result，bears today are 60 pounds lighter than what they were.Besides，smaller bears also produce weaker babies，and their chances of survival are at risk.In the plains of Africa，migratory animals like gazelles are traveling long distances for food，just to avoid falling prey (牺牲品) to humans who hunt them.
In an unusual step，experts from 120 countries have agreed to protect 31 migratory mammals，fish and birds.The United Nation's 11th annual Conservation of Migratory Species of Wild Animals(CMS)was held in Quito，Ecuador.For the first time，900 experts attended the conference，and the enthusiastic support shows the world is united in conservation (保护) efforts.
What does getting on a protected list mean？Countries that have signed the agreement will be required to pass laws locally and work with other countries that fall within the animal's migratory path.Only one animal did not make the list.The African lion was rejected (拒绝) for lack of information of the countries where it lives.
语篇解读 本文是一篇说明文。文章主要介绍了很多野生动物在迁徙途中遭受人类的捕杀 或受到人类活动的影响导致数量急剧下降。专家们呼吁世界各国联合起来保护迁徙物种。
1．What can we learn from the passage?
A．The Great Bustard is one of the largest flying birds.
B．The weight of polar bears today is lighter than what it was.
C．In the 1970s，ice sheets went down by 30 percent.
D．120 experts have agreed to protect 21 migratory animals.
B [细节理解题。根据第四段中的“As a result，bears hey were.”可知，现在北极熊的体重比原来少了60磅，故B项正确。]
2．Why was the African lion not included in the list from the passage?
A．We don't know which countries it lives in.
B．It isn't a migratory animal.
C．Experts are not interested in this animal.
D．It is not traveling long distances for food.
A [细节理解题。根据最后一段中的“Only one animal did not make where it lives.”可知，非洲狮没有在名单之内是因为我们不知道它们生活在哪些国家，故A项正确。]
3．The writer writes this passage aiming to ．
A．let us know about the animals
B．prevent the rare animals from dying out
陆立军
C．inform us of the effects of climate change
D．draw our attention to helping the migratory animals
D [写作目的题。通读全文可知，本文的写作意图是引起人们的注意来帮助迁徙的动物，故D项正确。]
4．All these factors have probably put the migratory animals in danger EXCEPT ．
A．some human activities
B．the enthusiastic support from experts
C．rising ocean temperatures
D．climate change
B [细节理解题。根据第四段中的“We have written peratures.”及“In the plains of Africa，...who hunt them.”可知，气候变化、海洋温度上升以及人类活动都是威胁迁徙物种的因素，食品工业科技专家的支持则是为了保护它们，故B项正确。]
B
Millions of years ago dinosaurs lived on the earth.In the days of dinosaurs the whole earth was warm and wet.There were green forests and they could find enough to eat.Later，parts of the earth became cold and dry，and the forests there died.Then dinosaurs could
not find enough to eat.This mu太康县国土局st be one reason why dinosaurs died out.
We can guess another reason.New kinds of animals came on the earth.Some had big brains and were fast and strong.They could kill dinosaurs.
There may be other reasons that we don't know about yet.Scientists are tryin胡书刚g to make more discoveries about dinosaurs.
Dinosaurs were of many sizes and shapes (形状)．Some were as small as chickens，while some were about 90 feet long.
There were also terrible fights between dinosaurs.They might have happened more than 100 million years ago.Though there was no man to see any of the fights，we can be told by the animal's footprints (足迹) that fights did take place.
语篇解读 本文是一篇说明文。恐龙灭绝的原因有很多种，到底哪种更合理些呢？
5．According to the passage，dinosaurs did exist only on the earth.核酸染料
A．for millions of years
B．millions of years ago
C．more than 100 million years ago
D．when it was warm and wet somewhere
B [细节理解题。根据文章开头第一句可知。故选B。]
6．One reason why dinosaurs died out is that ．
A．there were too many dinosaurs
B．parts of the earth became cold and dry
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