Snow falls in the Earth's extreme North and South throughout the year. However, the heaviest snowfalls have been reported in the mountains of other areas during winter. Snow is even known to fall near the Equator (赤道), but only on the highest mountains.

    Snow contains much less water than rain, but much of the water the world uses comes from snow. {#blank#}1{#/blank#} In the western United States, mountain snow provides up to seventy-five percent of all surface water supplies.

    Snowfall helps to protect plants and some wild animals from winter weather. Fresh snow is made largely of air trapped among the snow crystals (晶体). Because the air has trouble moving, the movement of heat is limited. {#blank#}2{#/blank#} The surface of the snow takes in, or absorbs, sound waves. As snow grows older or if there have been strong winds, it can become hard and flat. Then, the snow's surface will help to send back sound waves.

    {#blank#}3{#/blank#} It is responsible for the deaths of hundreds of people. Many people die in traffic accidents on roads covered with snow and ice or from being seriously stuck in the winter storm. {#blank#}4{#/blank#}.

    People may not be able to avoid living in areas where it snows often. However, they can avoid becoming victims of snowstorms. People should stop driving and stay at home until the storm has passed. People living in these areas should carry emergency supplies in their vehicle. {#blank#}5{#/blank#}

A. These include food, emergency medical supplies, and extra clothing to stay warm and dry.

B. Snow also influences the movement of sound waves.

C. Melting snow provides water for rivers, electric power stations and agricultural crops.

D. Mountain snowfall is heavier than that in the South and the North Poles.

E. In many places, streets were blocked; houses fell down and supplies were short.

F. Others die from heart attacks caused by too much physical activity out in the cold.

G. Snow may be beautiful, but it can be deadly.

    Compared to the history of China, the history of the United States is quite short.{#blank#}1{#/blank#} In 1776, 13 colonies（殖民地）located on the eastern coast of North America declared independence and fought a revolution against the British. In 1783 the colonists won the revolution and gained their independence.

    After the revolution, the United States bought a large section of country from Napoleon of France. This purchase doubled（加倍）the size of the United States. {#blank#}2{#/blank#} If he hadn't needed that money, the United States might have stayed a small country. Texas and most of what is now the southwestern part of the United States belonged to Mexico. The people of Texas fought a revolution against Mexico. {#blank#}3{#/blank#} Later, the United States and Mexico went to war. If Mexico had defeated the United States in that war, California and New Mexico would have been part of Mexico today.

    The British and the Americans both claimed the northwestern part of the country. They settled their differences with a compromise. South of the 49th parallel was the United States. North of the 49th parallel was Canada. In 1861 one half of the United States did go to war with the other half. {#blank#}4{#/blank#} President Lincoln wanted to free slaves. He was supported by the North but opposed by the South. The South wanted to separate from the rest of the country and become independent. {#blank#}5{#/blank#}

    Following the Civil War, the United States bought Alaska from Russia. Today it is the largest state in the country and a very important one, too.

A. This was the Civil War.

B. It was controlled by England then.

C. It began little more than 200 years ago.

D. After 4 years of war, the South was defeated.

E. Napoleon needed money for his European wars.

F. They became independent and joined the United States.

G. At that time many people didn't think Alaska was important.

    Here are six diet foods that can hurt your weight loss journey.

    Diet soda.

    {#blank#}1{#/blank#} Drinking diet soda can make you likely to overeat. The answer is because your body is tricked into believing you're ingesting sugar and it makes you crave more.

    Microwave popcorn.

    Microwave popcorn contains the organic compound diacety to give you that butter taste. Try to avoid this ingredient! {#blank#}2{#/blank#}

    Granola bars.

    Commercial granola bars can be loaded with corn syrup, salt and processed oils that can add to your waistline.   {#blank#}3{#/blank#}

    Veggie burgers.

    Say isn't so! Going veggie could damage your diet. Read the labels.{#blank#}4{#/blank#}Also Hexane has been found in veggie burgers. This a gasoline by-product used during the process of separating soybeans into oil.

    {#blank#}5{#/blank#}

    Yup. Low fat-products like yogurt can be loaded with sugar. In a cup of Stoneyfield Farm French Vanilla yogurt, there are 20-plus grams of sugar.

    Blue chips.

    Blue corn chips or vegetable chips are a great alternative to potato chips. But again, there needs to be portion control. They can be loaded with salt and fatty oils.

A. Roast meat.

B. Low fat yogurt

C. Diet soda can actually make you gain weight

D. You're better off making your own popcorn

E. Some are made with processed soy and loaded with oils and butter

F. It is as important for thinking as it is for lifting, especially as we age.

G. Opt(选择)for making your own granola at home, but watch your potions.

How to stay focused in class

    Being relaxed during class is a bad habit, and it is also bad to your grade. Focusing in class not only proves to teachers that you are a capable student but also shows that you have the ability to control yourself, which will be very important.

    {#blank#}1{#/blank#} No matter how much you want to sit with your friends during the class, try your best to avoid them. Talking with friends around you is not going to give you the focus in class. This will get you into trouble.

    Look at teacher and make eye contact. Your teacher is not just standing up there talking.{#blank#}2{#/blank#} Show the teacher that he or she has your full attention by looking them in the eye. This person should have your full attention at all times during class.

Take notes. By taking notes, you'll be able to "get into" the lesson. Write down key points as your teacher speaks. And listen to the key phrases such as "This is important" "This is the main idea" "This will be the test" etc.{#blank#}3{#/blank#}

    Get involved in class discussions. This is a wonderful way to become a more focused, successful student. When a teacher asks a question, offer to answer it.{#blank#}4{#/blank#} This shows the teacher that you are listening carefully during the class.

    Ask a question.{#blank#}5{#/blank#} This really shows your teacher that you want to be better, and can recognize the things you are having difficulty with. Chances are that someone else in the class has the same question （and was too afraid to ask!）. They'll be relieved, and so will you.

A. Avoid sitting with friends.

B. This can help you listen more attentively.

C. If he or she ask for an opinion, share your own.

D. Talking with friends makes you lose interest in class.

E. He or she is trying to give you an acceptable education.

F. The more quickly you answer, the more attention you pay.

G. If you don't understand something, never be afraid to ask.

How to Make Plans

    Most people get seared when talking about planning or writing plans,{#blank#}1{#/blank#}, And you need to plan for success as planning redly works and inspires you to go straight ahead. However, how to create effective plans is still a problem. Don't worry, and just follow the steps below.

    Step 1{#blank#}2{#/blank#}.

    What plans have you had in the past? Probably, in some of your plans, you haven't ended up where you thought you were going to end up, Get a good understanding of what you have done and what you haven't done in the past. It is a primary foundation for your new plan. If having no plan, just take actions and make plans right now.

    Step 2 Think about the What - Ifs

    When you are building your plans, you should consider where you are going and make clear the What - Its, Because not everything just goes smoothly as you believe,{#blank#}3{#/blank#}.

    Step 3 Document the plans

    When starting to make plans, you should try to write them down. It is of key importance for the future{#blank#}4{#/blank#}. In addition, make sure you have the plans fully written out with all the key elements concerned, including details.

    Step 4 Update the plans

    According to your written plans and actual situation, you should check out the plans you have completed and haven't completed,{#blank#}5{#/blank#}, Make sure all the assumptions are there and work out the details. After hanging on for some days, planning will be getting simpler and easier.

A. Review historical plans

B. Make new plans immediately

C. Actually, people are more likely to succeed in a planned way

D. And you need to continue what you haven't done and update it

E. Not all people can memorize every word they said and thought well

F. And what you should do next is to check your plan monthly or quarterly

G. For your benefits, you need to make Plan A and Plan B in case of changes and contingencies（偶发事件）.

    The pine tree is a special kind of tree.{#blank#}1{#/blank#}This is because many people put pine trees in their homes at Christmas time. They decorate the tree with colored lights, and put Christmas presents under the tree. Pine trees are different from other trees because most other trees lose their leaves in winter.{#blank#}2{#/blank#}So pine trees are also called evergreens.{#blank#}3{#/blank#}They have hard, thin leaves called needles. Pine trees also have pine cones. Pine cones look like hard berries. If you walk in a forest, you will see many pine cones on the ground.{#blank#}4{#/blank#}When the seeds fall to the ground, a new tree starts to grow. {#blank#}5{#/blank#}The wood is used to make furniture and boats. Many kinds of birds build their nests in pine trees. The seeds of pine trees are food for small animals such as squirrels and mice and for bigger animals such as rabbits and black bears. The needles are good food for large animals such as deer and moose when they cannot find anything to eat in the winter. If you walk in a forest of pine trees, the air has a wonderful smell. In winter, the white snow on the dark green trees looks very beautiful.

A. Pine trees stay green all year long, even in winter.

B. Pine trees do not have soft leaves like the maple tree.

C. Some people call the pine tree a Christmas tree.

D. Pine trees are very beautiful all year round.

E. Pine trees are valuable for many reasons.

F. Inside the pine cones are seeds.

G. The seeds inside the pine cones are the favorite food for some animals.