When ____ comes to saving energy, big changes...

When ____ comes to saving energy, big changes start with small steps, like turning off the lights.

高三英语单项填空简单题查看答案及解析

When ___ comes to saving energy , big changes start with small steps , like turning off the lights.

A. that  B. this   C. it   D. one

高三英语单项填空困难题查看答案及解析

When ____ comes to saving energy, big changes start with small steps, like turning off the lights.A. that               B. this                 C. it               D. one

高三英语单项填空中等难度题查看答案及解析

When _______ comes to saving energy, big changes start with small steps, like turning off the lights.

A. that              B. this                C. it             D. one

高三英语单项填空中等难度题查看答案及解析

The wisdom________comes with age makes a big difference to leadership.

A．where         B．when  C．what   D．that

高三英语单项填空中等难度题查看答案及解析

A recent experiment proves that bees can save time and energy when they fly around to different flowers.

Dr Nigel Raine, from the Royal Holloway University of London, has always been interested in finding out why animal behave like they do. He is also interested in bees. It was not a surprise when he and some other scientists from Queen Mary University of London discovered that bees can quickly solve a problem that takes computers many days.

Flowers make pollen (花粉), and when bees visit them, they carry the pollen to other flowers. The plants need the pollen to make seeds that will grow. Dr Raine notes that we get a lot of our food from plants, so it is important to know how the bees move around and take the pollen between flowers. The scientists wanted to examine the journey that the bees take and how they save energy when they do this. They completed the experiment on the roof of Queen Mary University, using artificial flowers and a large amount of nectar, a sweet liquid produced by flowers. They taught one bee to visit all the flowers in one place at the same time. When the bee got to know the location of the flowers well, they saw how it flew around and returned home with the nectar. After this, they changed the locations of the flowers. The scientists thought the bee would follow the route it knew already. This would mean that it followed a longer route than it needed to, and so it would use more energy. They watched the bee carefully as it travelled between the flowers in their new location, and they made notes. But in the experiment, the bee changed its route and flew a shorter distance.

The problem that the bee solved is similar to a maths puzzle called the ‘travelling salesman problem’. A salesman who goes to different places to sell things wants to travel the shortest distance. But he has to calculate the length of many possible routes to know which one is the shortest. A computer can calculate this but the experiment shows bees can do the same calculation quickly with a tiny brain. Scientists are very interested in how they do this. It would help us to understand how pollen is moved around. In addition, if they find this out, it could help us to improve communication networks. This might help humans to reduce traffic jams when there is an accident, for example.

1.The underlined word “nectar” in the third paragraph means_________.

A. powder B. honey

C. vitamin D. water

2.The researcher’s experiment found _________.

A. bees could manage to avoid accidents

B. bees showed signs of being very intelligent

C. bees could take the same route they knew before

D. bees were faster at calculating distance than computers

3.According to the last paragraph, the next step of the study is to discover how _______.

A. pollen is moved around

B. traffic jams can be reduced

C. bees can calculate so quickly

D. communication networks are improved

4.Where does this passage probably come from?

A. A novel. B. A website.

C. A science magazine. D. An advertisement.

高三英语阅读理解中等难度题查看答案及解析

E-shopping,when properly _____ ,can save us a lot of time and energy.

A. done            B. doing          C. to do                D. is done

高三英语单项填空中等难度题查看答案及解析

We already know the fastest, least expensive way to slow climate change: Use less energy. With a little effort, and not much money, most of us could reduce our energy diets by 25 percent or more—doing the Earth a favor while also helping our wallets.

Not long age. My wife, PJ, and I tried a new diet—not to lose a little weight but to answer an annoying question about climate change. Scientists have reported recently that the world is bending up even faster than predicted only a few years ago, and that the consequences could be severe if we don’t keep reducing emissions（排放）of carbon dioxide（CO₂）and other greenhouse gases that are trapping heat in our atmosphere.

We decided to try an experiment. For one month we recorded our personal emissions of CO₂^. . We wanted to see how much we could cut back, so we went on a strict diet. The average US household（家庭）produces about 150 pounds of CO₂ a day by doing common-place things like turning on air-conditioning or driving cars. That’s more than twice the European average and almost five times the global average, mostly because Americans drive more and have bigger houses. But how much should we try to reduce?

For an answer, I checked with Tim Flannery, author of The Weather Makers: How Man Is Changing the Climate and What It Means for Life on Earth. In his book, he had challenged readers to make deep cuts in personal emissions to keep the world from reaching extremely important tipping points, such as the melting（融化）of the ice sheets in Greenland or West Antarctica. “To stay below that point, we need to reduce CO₂ emissions by 80 percent,” he said.

Good advice, I thought. I’d opened our bedroom windows to let in the wind. We’d gotten so used to keeping our air-conditioning going around the clock. I’d almost forgotten the windows even opened. We should not let this happen again. It’s time for us to change our habits if necessary.

1.Why did the author and his wife try a new diet?

A. To take special kinds of food          B. To respond to climate change.

C. To lose weight                      D. To improve their health

2.The underlined words “tipping points” most probably refer to

A. freezing points       B. burning points       C. melting points     D. boiling points

3.It can be inferred from the passage that

A. it is necessary to keep the air-conditioning on all the time

B. it seems possible for every household to cut emissions of CO₂

C. the average US household produces about 3,000 pounds of CO₂ a month

D. the average European household produces about 1,000 pounds of CO₂ a month

4.Which of the following would be the best title for this passage?

A. Saving Energy Starts at Home

B. Changing Our Habits Begins at Work

C. Changing Climate Sounds Reasonable

D. Reducing Emissions of CO2 Proves Difficult

高三英语阅读理解中等难度题查看答案及解析

We already know the fastest, least expensive way to slow climate change: Use less energy. With a little effort, and not much money, most of us could reduce our energy diets by 25 percent or more—doing the Earth a favor while also helping our wallets.

Not long ago, my wife, PJ, and I tried a new diet—not to lose a little weight but to answer an annoying question about climate change. Scientists have reported recently that the world is bending up even faster than predicted only a few years ago, and that the consequences could be severe if we don’t keep reducing emissions（排放）of carbon dioxide（CO₂）and other greenhouse gases that are trapping heat in our atmosphere.  21世纪We decided to try an experiment. For one month we recorded our personal emissions of CO₂^. . We wanted to see how much we could cut back, so we went on a strict diet. The average US household（家庭）produces about 150 pounds of CO₂ a day by doing common-place things like turning on air-conditioning or driving cars. That’s more than twice the European average and almost five times the global average, mostly because Americans drive more and have bigger houses. But how much should we try to reduce? For an answer, I checked with Tim Flannery, author of The Weather Makers: How Man Is Changing the Climate and What It Means for Life on Earth. In his book, he had challenged readers to make deep cuts in personal emissions to keep the world from reaching extremely important tipping points, such as the melting（融化）of the ice sheets in Greenland or West Antarctica. “To stay below that point, we need to reduce CO₂ emissions by 80 percent,” he said.

Good advice, I thought. I’d opened our bedroom windows to let in the wind. We’d gotten so used to keeping our air-conditioning going around the clock. I’d almost forgotten the windows even opened. We should not let this happen again. It’s time for us to change our habits if necessary.

1. Why did the author and his wife try a new diet?

A. To take special kinds of food          B. To respond to climate change.

C. To lose weight                      D. To improve their health

2.The underlined words “tipping points” most probably refer to .

A. freezing points       B. burning points       C. melting points     D. boiling points

3.It can be inferred from the passage that 2___.   ..

A. it is necessary to keep the air-conditioning on all the time ..

B. it seems possible for every household to cut emissions of CO₂

C. the average US household produces about 3,000 pounds of CO₂ a month.

D. the average European household produces about 1,000 pounds of CO₂ a month.

4.Which of the following would be the best title for this passage?

A. Saving Energy Starts at Home         B. Changing Our Habits Begins at work

C. Changing Climate Sounds Reasonable  D. Reducing Emissions of CO₂ Proves Difficult    

高三英语阅读理解简单题查看答案及解析

The answer to protecting and saving marine(海洋) wildlife can start with cutting back on something Americans use every day—plastic drinking straws. Actor Adrien Grenier, best known for playing Vincent Chase in 2015 movie Entourage, has launched a campaign to reduce the amount of single-use plastic usage in this country in order to protect and save marine wildlife and the environment. Plastic drinking straws are among many single-use plastic products contributing to the shocking loss of marine life, but they’re a great place to start because they’re something Americans are using by the hundreds of millions without any awareness that they’re so damaging.

According to Ecocycle, an international environmental organization, Americans use more than 500 million straws daily, which are enough to fill 127 school buses each day, and they can’t be recycled. They means plastic straws end up in landfills or oceans, where fish and other marine wildlife mistake the small bits for food and swallow them. After seeing a photo of a whale beached on the shore with a belly full of plastic, Grenier felt the inspiration to launch the Lonely Whale Foundation, hoping to inspire and educate others on the challenges facing marine life.

Along with stopping the use of straws, Grenier hopes to educate consumers on the dangers of other single-use plastic items such as grocery bags and water bottles. While many Americans use these plastic products in their daily life, there are more sustainable alternatives that can help protect the environment. Ecocycle recommends the use of straws made from stainless steel, glass, and even bamboo instead of plastic. You can buy a number of these environmentally friendly straws online and in stores.

1.What initially contributed to the start of Grenier’s campaign?

A. Plastic straws in landfills.

B. A picture of a dead whale.

C. The severe damage done to the sea.

D. The disappearance of some species under the sea.

2.What is the primary purpose of the Lonely Whale Foundation?

A. To advocate a green lifestyle.

B. To promote Grenier’s latest movie.

C. To save precious natural resources.

D. To encourage people to protect ocean life.

3.Ecocycle advises people to use straws that are ________.

A. easy to recycle

B. convenient to use

C. special to marine life

D. harmless to the environment

高三英语阅读理解中等难度题查看答案及解析