Many insects are useful to humans. For example, some farmers put ladybugs on their plants these insects eat insects that destroy crops. A. though B. because C. but D. while 题目和参考答案——青夏教育精英家教网—

题目内容

Many insects are useful to humans. For example, some farmers put ladybugs on their plants _______ these insects eat insects that destroy crops.

A. though　　　　　　 B. because　　　　　　 C. but　　　　　　　　 D. while

答案：B
提示：

联系上句，这里应该是解释原因，所以选择B。

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We all have ideas about what kinds of foods are good to eat. We also have ideas about what kinds of foods are bad to eat. As a result, people from one culture often think the foods that people from another culture eat are nauseating(令人作呕的). When the famous boxer Muhammad Ali visited Africa, for example, one member of his group became quite sick when he saw someone pick up a butterfly and eat it. Many people would find it disgusting to eat rats, but there are forty-two different cultures whose people regard rats as appropriate food.

Food likes and dislikes do not always seem related to nutrition. For example, broccoli is first on a list of the most nutritious common vegetables, but it is twenty-first on a list of vegetables that Americans like most to eat. Tomatoes are sixteenth on the list of most nutritious vegetables, but they are first on the list of vegetables that Americans like most to eat.

But dislike is not the only reason why some cultures will not eat a certain food. In some cultures, certain foods are taboo. Some foods are taboo in certain religions, but there are also other food taboos that are not connected to a religion. We do not usually think about why certain things are taboo in our culture. We may not even know why they are taboo. Anthropologists(人类学家) try to discover the hidden reasons for taboos.

Anthropologists believe that most food likes and dislikes are a result of the ways of life of different people. Some people live in areas where there are both large animals and many insects. It is difficult for these people to kill large animals, and it requires a lot of energy. It is easier for them to use insects for food because it is not difficult to catch insects and it does not require a lot of energy. Nomadic(游牧的) people who move around will not want to keep pigs for food. People will not eat pets such as dogs. Americans eat a lot of beef because there is plenty of land for raising cattle and the meat can be shipped cheaply for long distances by railroads.

What’s the main topic of this passage?

A. Food and religion. B. Food and culture.

C. Nutrition of different foods. D. Different ways of life.

Which of the following statements is TRUE about food likes and dislikes?

A. They are seldom related to nutrition.

B. They are mostly associated with people’s taste.

C. They are mostly connected with people’s life styles.

D. They are usually related to cultures or religions.

The underlined word “taboo” (Line 3, Para. 3) refers to _____.

A. something undiscovered B. certain religions

C. something forbidden D. certain foods

What can we infer from the passage?

A. It is believed that brcoccoli is more nutritious than tomatoes.

B. Americans prefer tomatoes to beef.

C. People in Inner Mongolia would probably like to keep pigs for food.

D. The famous boxer Muhamm Ali would like to eat rat rather than butterfly.

Why do Americans prefer to eat beef?

A. Because beef provides a lot of energy people require.

B. Because beef is on the list of the most nutritious foods.

C. Because they have the ideal condition to keep and ship cattle.

D. Because cattle are large animals.

第三部分：阅读理解（共20小题，每题2分，满分40分）
阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。
A
We bet that on cold wintry days, many of you love to stay in your warm home and, every now and then, come out into the kitchen for a snack. Unfortunately, plenty of creepy-crawly critters(爬行生物) like to do the same thing!
Winter is the time when bugs (虫子) invade your house without an invitation. The season can be tough for such creatures. In winter the air is cold, the ground is hard and many trees have no leaves. So bugs do what they have to do to survive.
Monarch butterflies head south to warmer climates. Ants crowd in deep underground colonies and eat food they have been storing all year. Many insects go into a deep sleep called diapause. There’re different kinds of diapause, but all are similar to hibernation, a time when bigger animals become inactive in the cold. Insects go into an inactive period, too, but it often isn’t when the temperature drops.
They rely on more dependable signals in the environment. For example, many insects can tell how much sunlight there’s each day. They use that to tell them when to shut down. Bugs are cold-blooded, meaning that their inside temperature is the same as the outside. They can’t move much when it gets below 40 degrees Fahrenheit. So they search for any warm place.
They’re looking for protection. These guys have been doing this for 300 million years, so they don’t really know they’re coming into your house. The home is a recent event in terms of their evolutionary behavior. They enter through tiny cracks or come in unnoticed on your clothes or shoes. Remember that they may be invading your homes for warmth and food, but they don’t care about humans.
56. What is the purpose of the first paragraph?
A. To point out that humans like to stay at home in winter.
B. To mean that humans and bugs have the same living habits.
C. To mean that bugs will invade the house for their winter.
D. To put forward the idea that bugs are not welcome in winter.
57. According to the text, what is diapause?
A. It is the same as the animals’ hibernation.
B. It often appears in warm areas all the year.
C. It is done to keep bugs active in winter.
D. It is a deep sleep similar to hibernation.
58. What often decides bugs’ diapause?
A. The lower local temperatures.           B. The amounts of sunlight.
C. Kinds of environmental signals.         D. The insects’ inside temperature.
59. According to the text, bugs invade humans’ homes to ______.
A. attack humans                                 B. look for enough food
C. seek for protection                           D. show their evolutionary results
60. What would be the best title for the text?
A. Bugs’ life on cold wintry days
B. Why bugs invade your home in winter?
C. Good relations between humans and bugs
D. What does diapause mean?

It was a village in India.The people were poor.However，they were not unhappy.After all，their forefathers had lived in the same way for centuries.

Then one day，some visitors from the city arrived.They told the villagers there were some people elsewhere who liked to eat frog’s legs.However，they did not have enough frogs of their own，and so they wanted to buy frogs from other places.

This seemed like money for nothing.There were millions of frogs in the fields around，and they were no use to the villagers.All they had to do was catch them.Agreement was reached，and the children were sent into the fields to catch frogs.Every week a truck arrived to collect the catch and hand over the money.For the first time，the people were able to dream of a better future.But the dream didn’t last long.

The change was hardly noticed at first，but it seemed as if the crops were not doing so well.More worrying was that the children fell ill more often，and，there seemed to be more insects around lately.

The villagers decided that they couldn’t just wait to see the crops failing and the children getting weak.They would have to use the money earned to buy pesticides(杀虫剂) and medicines.Soon there was no money left.

Then the people realized what was happening.It was the frog.They hadn’t been useless.They had been doing an important job—eating insects.Now with so many frogs killed，the insects were increasing more rapidly.They were damaging the crops and spreading diseases.

Now，the people are still poor.But in the evenings they sit in the village square and listen to sounds of insects and frogs.These sounds of the night now have a much deeper meaning.

(2010·辽宁，A)

1.From Paragraph 1 we learn that the villagers ________.

A．worked very hard for centuries

B．dreamed of having a better life

C．were poor but somewhat content

D．lived a different life from their forefathers

2.Why did the villagers agree to sell frogs?

A．The frogs were easy money.

B．They needed money to buy medicine.

C．They wanted to please the visitors.

D．The frogs made too much noise.

3.What might be the cause of the children’s sickness?

A．The crops didn’t do well.

B．There were too many insects.

C．The visitors brought in diseases.

D．The pesticides were overused.

4.What can we infer from the last sentence of the text?

A．Happiness comes from peaceful life in the country.

B．Health is more important than money.

C．The harmony between man and nature is important.

D．Good old days will never be forgotten.

It was a village in India. The people were poor. However, they were not unhappy. After all, their forefathers had lived in the same way for centuries.

Then one day. Some visitors from the city arrived. They told the villagers there were some people elsewhere who liked to eat frog’s legs. However, they did not have enough frogs of their own, and so they wanted to buy frogs from other places.

This seemed like money for nothing. There were millions of frogs in the fields around, and they were no use to the villagers. All they had to do was catch them. Agreement was reached, and the children were sent into the fields to catch frogs. Every week a truck arrived to collect the catch and hand over the money. For the first time, the people were able to dream of a better future. But the dream didn’t last long.

The change was hardly noticed at first, but it seemed as if the crops were not doing so well. More worrying was that the children fell ill more often, and, there seemed to be more insects around lately.

The villagers decided that they couldn’t just wait to see the crops failing and the children getting weak. They would have to use the money earned to buy pesticides(杀虫剂) and medicines. Soon there was no money left.

Then the people realized what was happening. It was the frog. They hadn’t been useless. They had been doing an important job---eating insects. Now with so many frogs killed, the insects were increasing more rapidly. They were damaging the crops and spreading diseases.

Now, the people are still poor. But in the evenings they sit in the village square and listen to the sounds of insects and frogs. These sounds of the night now have a much deeper meaning.

1.From paragraph I we learn that the villagers __________.

A. worked very hard for centuries

B. dreamed of having a better life

C. were poor but somewhat content

D. lived a different life from their forefathers

2.Why did the villagers agree to sell frogs?

A. the frogs were easy money

B. They needs money to buy medicine

C. they wanted to please the visitors

D. the frogs made too much noise

3. What might be the cause of the children’s sickness?

A. the crops didn’t do well

B. there were too many insects

C. the visits brought in diseases

D. the pesticides were overused

4.What can we infer from the last sentence of the text?

A. Happiness comes from peaceful life in the country

B. Health is more important than money

C. The harmony between man and nature is important

D. good old day will never be forgotten

第三部分阅读理解（共两节，满分40分）

第一节（共15小题；每小题2分，满分30分）

　　阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。

　　Soon it may be harder to stop and smell the roses.

　　Growing levels of air pollution from power plants and automobiles have reduced flower fragrances (芬芳) by up to 90 percent in the US.That is compared with pre-industrial levels,a new study has found.

　　The trend is unpleasant for human noses,but may be life - threatening for bees and butterflies.

　　"Many insects find flowers by folowing the scent(香味) produced by those flowers," said the studies lead author Jose D.Fuentes,an environmental scientist at the University of Virginia.

　　"The increasing pollution makes it difficult for them to locate the flowers and feed on their nectar(花蜜)."

　　Scientists have alrady known that flowers produce scent molecules(分子) that bond with pollutants.The process breaks down the plants' sweet smell.

　　With more pollution in the air,the scent molecules don't remain effective as long and travel shorter distances on the wind.

　　The new study suggests that in the mid - 19th century,when pollution levels were first recorded,scent molecules would have been able to travel some 1,000 to 1,200 meters.

　　Today,in the polluted air found downwind of large cities,scentst may only make it some 200 to 300 meters.

　　The report was recently published in the journal,Atmospheric Environment.

　　Bee farmers have reported that bee populations are dropping dramatically in many parts of the world in recent years. Could these missing scents be a factor?

　　Scientists trying to hind the cause of bee population declines have blamed bacteria,pesticides,and even cellphone radiation.

　　Jay Evans,an entomologist(昆虫学者) at the US Department of Agriculture's bee research laboratory,was interested in the new study.But he says he hasn't seen bee behavior that suggests trouble with scents.

　　"Over the last couple of summers I don't think the bees in this area were bringing in much less food,"he said.

　　"It might be that they had to work harder,but it seems like as long as there were bees to collect food they were finding flowers somewhere."

　　But Fuentes fears that the fading smell of flowers may stress insects that are already faced with other threats.

　　"The effects shown in these studies will simply exacerbate whatever the bees are going through right now,"he said.

　　"It's something that is really worthwhile paying attention to."

　　56.What's the passage mainly about?

　　　A.How greatly air plooution affects our lives.

　　　B.Effects of air pollution on bee populations.

　　　C.Measures to fight air pollution.

　　　D.The rapid decline of bee populations in the world.

　　57.According to the passage,Jay Evans probably agrees that ______ .

　　　A.bees are the insect that suffers most from air pollution

　　　B.bees are at risk of dying out owing to air pollution

　　　C.the fading smell of flowers doesn't affect bees so greatly as was thought

　　　D.as is often the case,bees fail to locate the flowers because of the missing scents

　　58.The word"exacerbate" in the last paragraph but one probably means ______.

　　　A.worsen B.improve C.get rid of D.decrease

　　59.Which of the following is NOT true according to the passage?

　　　A.The more air pollution there is in a region,the greater the destruction of the flower scents.

　　　B.Bacteria,pesticides,and cellphone radiation are blamed for causing the decline of bees.

　　　C.The scent molecules produced by flowers in a less polluted environment oculd travel longer and farther.

　　　D.Air pollution does more harm to insects such as bees and butterflies than human beings.

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