Even if these chemicals are still in experime...

Even if these chemicals are still in experimental stages, they _____ to be a number one hit.

A. intend        B. predict        C. arrange        D. Promise

高二英语单项填空困难题查看答案及解析

Even if trees cannot walk, they are still on the move.

In parts of the Arctic, entire forests are moving northward. Across the Arctic, temperatures are rising faster than anywhere else in the world. As that happens, the tree line that marks where forests stop and the treeless tundra （冻土地带）starts has been shifting northward. Trees growing along the tree line must protect themselves from the cold wind. To do this, plants tend to grow horizontal （水平的）branches low to the ground. The energy it takes for trees to grow this way means they don't have enough energy to make seeds.

But as Earth's climate has been warming, trees no longer have to just grow horizontally. Many can instead grow up toward the sky. This takes less energy. And with all the leftover energy. these trees have started producing more seeds. This happens especially in places where the white spruce （白云杉）grows.

White spruce, which is a North American tree, is quite able to produce a lot of seeds, which can move long distances in the wind. When wind-blown seeds end up on the tundra beyond the tree line, they eventually can sprout （发芽） new trees. This explains how a forest can move. Of course, the process would work only if the tundra were warm enough. But in recent years, the whole planet has been warming.

New trees will provide shelters for some snow, keeping the sun’s rays from making the white surface disappear. Instead, the trees absorb the sun's heat. This warms the surrounding air. The extra warmth encourages even more trees to produce seeds. That further boosts a forest's ability to expand. In addition, more trees will trap more snow, preventing much of it from being blown away. Snow can trap heat in the soil below,which encourages trees to grow. The recent rise of temperature has helped more trees grow.　 The recent rise of temperatures has helped more trees grow past the tree line. People worry about impacts on the animals that depend on frozen conditions for food and shelter.

1.What is the main cause of the trees in the Arctic moving northward?

A. The rising temperature.

B. The shrinking of northern tundra.

C. The fierce and cold wind.

D. The abundant resources in the north.

2.What does the underlined word, “this”, in Paragraph 2 mean?

A. To produce more seeds.

B. To move northward

C. To respond to the climate change.

D. To protect themselves from the cold wind.

3.What can be inferred from the last paragraph?

A. New trees can trap the snow, which may make the soil colder.

B. The trapped snow prevents new trees from producing more seeds.

C. New trees can make the surrounding air warmer.

D. New trees can bring more food and shelter for local animals.

4.The passage is most probably taken from _______.

A. a health report　　　　　　　　　　　　 B. a science report

C. a fashion magazine　　　　　　　　　　 D. a children's magazine

高二英语阅读理解中等难度题查看答案及解析

Even if you are naturally shy, these three tricks will help you to quickly build a new social circle in any new city.

1. Take pictures

One of the great things about taking pictures at an event or party is that it gives you an excuse to get in touch with the person later. Everybody loves seeing pictures of themselves, and it’s very easy after taking a picture to say “If you’d like I can email it to you.” This can be the seed that leads to new connections. The next time you hear about a fun event email your new contacts to let them know about it.

2. Eat alone in public

You might feel self-conscious eating by yourself but it has an important benefit: you are much easier to approach when you are alone. People may be afraid of interrupting you or being rude if you are in a conversation with someone else. Bring a book or newspaper to read (this will make you feel less self-conscious). Plus, having an interesting book with you will give others an excuse to start a conversation if they’ve read it.

3. Join a class, sports team, or club

Yoga, salsa dancing, volleyball, Toastmasters (a public speaking club), a class for work, etc. Take up a new hobby or continue an old one!

These are all great places to meet new people, primarily because you will be forced to see the same people over and over again in the class. You will automatically make friends with them if you have a common interest and are forced to see each other again.

Tips：

*In the beginning, never turn down an invitation from someone, even if it’s something you wouldn’t normally do.

*Email your new friends with fun things to do instead of always asking what their plans are. If they have a better plan you can drop yours and join them. This will help establish you as someone who is contributing value instead of just taking it (people want this in a friend).

*Don’t let little things in life upset you or be a negative person. People don’t want to be around someone like that!

1.When having meals, you’d better ________ if you want to make new friends.

A.approach others to show conscious friendliness

B.start a conversation with those who have friends aside

C.invite others to your apartment to eat together

D.sit on your own in public places

2.According to the text, which of the following is NOT mentioned as an advantage of joining a class?

A.It helps you find out people who share a common interest with you.

B.It helps you find out your interest and take up a new hobby.

C.It offers an opportunity to meet the same people repeatedly.

D.It is a good way to meet new people and make friends in a new city.

3.Which of the following pieces of advice is a tip from the text?

A.Try to be outgoing and talkative instead of being shy.

B.Never turn down an invitation from your friends.

C.Offer suggestions on how to spend time together.

D.Always give a positive response to any request.

4.By writing the text, the author intends to tell us ________.

A.why you should change when you move to a new city

B.how you can make new friends in a new city

C.why you should make new friends in a new city

D.how you can keep in touch with strangers

高二英语阅读理解中等难度题查看答案及解析

Even if you are naturally shy, these three tricks will help you to quickly build a new social circle in any new city．

1．Take pictures

One of the great things about taking pictures at an event or party is that it gives you an excuse to get in touch with a person．Everybody loves seeing pictures of themselves，and it’s very easy after taking a picture to say “If you’d like I can email it to you”．This can be the seed that leads to new connections．The next time you hear about a fun event email your new contacts to let them know about it．

2．Eat alone in public

You might feel self-conscious eating by yourself but it has an important benefit：you are much easier to approach when you are alone．People may be afraid of interrupting you or being rude if you are in a conversation with someone else．Bring a book or newspaper to read (this will make  you feel less self-conscious)．Plus，having an interesting book with you will give others an excuse to start a conversation if they’ve read it．

3．Join a class，sports team，or club

Yoga，salsa dancing，volleyball，Toastmasters (a public speaking club)，a class for work，etc. Take up a new hobby or continue an old one!

These are all great places to meet new people，primarily because you will be forced to see the same people over and over again in the class．You will automatically make friends with them if you have a common interest and are forced to see each other again．

Tips：

* In the beginning．never turn down an invitation from someone，even if it’s something you wouldn’t normally do．

* Email your new friends with fun things to do instead of always asking what their plans are, If they have a better plan you can drop (放弃) yours and join them．This will help establish（建立） you as someone who is contributing value instead of just taking it (people want this in a friend) ．

*Don’t let little things in life upset you or be a negative person．People don’t want to be around someone like that！

1.  can give you an excuse to start new connections．

A．Taking pictures of others       B．Eating by yourself in public

C．Reading interesting books      D．Joining group activities

2.According to the text，which of the following is NOT mentioned as an advantage of joining a class?

A．It helps you find out your interest and take up a new  hobby．

B．It helps you find out people who share a common interest with you．

C．It offers an opportunity to meet the same people repeatedly．

D．It is a good way to meet new people and make friends in a new city．

3.Which of the following pieces of advice is a tip from the text?

A．Try to be outgoing and talkative instead of being shy．

B．Never turn down an invitation from your friends．

C．Offer suggestions on how to spend time together．

D．Don’t give a negative response to any request．

高二英语阅读理解中等难度题查看答案及解析

If you have stage fright, or the anxiety or fear of speaking in public, you are not alone. Stage fright or performance anxiety is a natural phenomenon. The good news is that one can completely overcome stage fright. Here are some tips to help you overcome stage fright.

Understand the symptoms（症状）of a stage fright. You feel anxious, your throat tightens up, you start sweating, you forget all that you have memorized, and your knees and legs feel weak. Your heart literally explodes and every part of you is asking you to run. But be relaxed. Many top actors and actresses have experienced these similar symptoms of stage fright. 1.

Plan well. One of the first keys of public speaking (or singing, playing the piano or acting) is to plan well. First, thoroughly(彻底地) study the subject you are going to talk about. 2.　 Besides knowing your subject well, it’s also necessary to do some research on your audience. Adequate planning on these aspects will help you achieve the maximum of your potential.

Keep eye contact.　 3.　 Your influence will decrease considerably if they think you are talking over their heads. Keeping eye contact can also help you see their body language.

Focus on breathing. Your mind is deeply connected to your breath. 4.It can help you stay mindful and avoid thoughts about past failures.

5.　　 Preparation is the key to overcoming symptoms of stage fright. When you practice your speech a thousand times, you will relax in the knowledge that you will be confidently speaking without fear. Prepare so you can relax during the task.

A. Practice as much as possible.

B. Therefore, don’t be too worried.

C. Second, you need to know your audience.

D. The audience like to see you looking at them.

E. So arrive early to get comfortable in the environment.

F. Second, you should use visual aids and technology wisely.

G. The longer and deeper your breath is, the calmer your mind will be.

高二英语七选五中等难度题查看答案及解析

________ bad-tempered at times, he is still respected by all the students.

A. In spite of 　　 B. Even if 　　 C. Not until　　 　 D. Despite

高二英语单项填空中等难度题查看答案及解析

Though great progress has been made in science these years, there are still many people lived in poor conditions. They make their lives by collecting and selling used thing. Their children cannot go to school because they have not enough money to send their children to there. Why you think so many people still suffer from poverty now? The answer lies on the population explosion. A　 president of a developing country once said; “It is us who are to blame for the poverty because we used to ‘produce’ child without limit.” Although this few words sound simple enough, they have clear pointed out one of the causes of the population explosion.

高二英语短文改错中等难度题查看答案及解析

Electric cars are dirty. In fact, not only are they dirty, but they might even be more dirty than their gasoline-powered cousins.

People in California love to talk about “zero-emissions (排放) vehicles”, but people in California seem to be clueless about where electricity comes from. Power plants mostly use fire to make it. Apart from the few people who have their roofs covered with solar cells, we get our electricity from generators (发电机). Generators are fueled by something----usually coal, oil, but also by heat generated in nuclear power plants. There are a few wind farms and geothermal (地热) plants as well, but by far we get electricity mainly by burning something.

In other words, those “zero-emissions” cars are likely coal-burning cars. Because the coal is burned somewhere else, it looks clean. It is not true. It's as if the California Greens are covering their eyes----“If I can't see it, it's not happening.” Gasoline is an incredibly (极其) efficient way to power a vehicle; a gallon of gas has a lot of energy in it. But when you take that gas (or another fuel) and first use it to make electricity, you waste a nice part of that energy, mostly in the form of wasted heat--at the generator, through the transmission lines, etc.

A gallon of gas may drive your car 25 miles. But the electricity you get from that gallon of gas won't get you nearly as far---so electric cars burn more fuel than gasoline-powered ones. If our electricity came mostly from wind or geothermal, or solar, then an electric car truly would be clean. But for political, technical, and economic reasons, we don't use much of those energy sources.

In addition, electric cars' batteries which are poisonous for a long time will eventually end up in a landfill (垃圾填埋场). And finally, when cars are the polluters, the pollution is spread across all the roads. When it's a power plant, though, all the junk is in one place. Nature is very good at cleaning up when things are not too concentrated, but it takes a lot longer when all the garbage is in one spot.

1.Which of the following words can replace “be clueless about” in Paragraph 2?

A. be familiar with.　　　　　　　　　　　　　 B. fail to understand.

C. be curious about.　　　　　　　　　　　　　 D. show their interest in.

2.The electricity we get from a gallon of gas may make our car run _________.

A. at least 25 miles　　　　 　　　　　　　　 B. more than 25 miles

C. less than 25 miles　　　　　　　　　　　　 D. as far as 25 miles

3.In the author’s opinion, compared with cars using gas, electric cars are more __________.

A. harmful　　　　　　　　　　　　 　　 B. expensive

C. efficient　　　　　　　　　　　　　　 D. environmentally-friendly

4.It can be inferred from the passage that __________.

A. electric cars’ batteries are no longer poisonous in the landfill

B. electric cars are not clean since we get electricity mainly by burning something

C. zero-emissions vehicles should be chosen to protect our environment

D. now electric cars are used more than their gasoline-powered cousins

高二英语阅读理解中等难度题查看答案及解析

---Are you still working in Shanghai?

---No, I’m working in Hangzhou now. I ______ in Shanghai for three years.

A. worked     B. have worked     C. had worked      D. was working

高二英语单项填空简单题查看答案及解析

It is a surprise for me to see that these old-fashioned machines are still ________ in the big city.

A．in order          B．in use            C．in danger          D．in difficulty

高二英语单项填空中等难度题查看答案及解析