Currently offered by some famous universities, MOOCs are attractive to people who do not have the financial resources to meet the growing costs of university education, or who do not have formal qualifications. They also allow participants to study at their own pace.

    The potential for MOOCs to deliver education is obviously vast—they could be considered as a huge step forwards in widening participation. They also have the potential to provide a unique window on universities that offer popular and valuable courses, they may attract some participants to register for formal fee-paying programmes at the same or other universities and are likely to promote new ways of on-line education.

    However, it is still very early days for MOOCs. The quality of the education provision is highly variable, with many courses offering only recordings of lectures, and delivery is particularly difficult in some special fields that require practical classes, research projects or extensive library access. Besides, wider engagement with participants requires very considerable resource. Even limited feedback or examination becomes a major task if there are several thousand students in the class.

Considering the challenges, some people argue MOOCs will soon evaporate (蒸发). But they certainly provide good opportunity for widening higher education, are a means of raising awareness of universities to audiences of tens or hundreds of thousands, and are well worthy of serious consideration.

If something that you're doing doesn't challenge you, then it doesn't change you. We all need some normal stress in our lives, after all{#blank#}1{#/blank#} So challenge the following limits:

Figure out what you're scared of and do it continuously.

If you're a salesman，and you're scared of talking to people personally or over the phone, now, instead of being scared and thinking you'll fail, spend at least five minutes a day to pick up the phone and make a call.{#blank#}2{#/blank#} But don't stop on the first try! Eventually, you can look at fear in the eyes and say, “Go on, I'm not scared!”

    {#blank#}3{#/blank#}

    Make sure this hobby is not linked to your career; you have to relax and relieve your stress while performing this. Some examples might be cooking, sewing, painting and so on. Apart from helping you challenge yourself, taking a class for your hobby may also give you extra income.

    Set aside at least nine minutes a day for physical exercise.

    {#blank#}4{#/blank#}A simple 9-minute run around your neighborhood can do wonders for yourself. Exercise can not only help you maintain your regular weight, but also make feel better about yourself.

    Travel and allow yourself to be interested in new people.

    Don't just limit yourself to your fellow travelers-try to connect with the service staff. You never know what kind of people they're going to be. Get out of your house or go online right now to book your class.{#blank#}5{#/blank#}

A. You should do it continuously.

B. Someone may hang up on you.

C. You don't need to go to the gym.

D. Running in the gym may be a better choice.

E. Start to travel now and learn to challenge yourself.

F. Take a class for a hobby you've been wanting to develop.

G. You can never see any improvement if you stick to your comfort zone.

    We were high in the mountains of Xishuangbanna, as far south as you can get in Yunnan, skirting the borders of Myanmar and Laos. The drive was typical, textbook beauty: mountains thick with rubber tree forests, pu'er tea plantations and banana palms and tiny Dai villages. Hidden among the fields of green, I spotted an odd collection of wooden boxes near a tent on the side of the road{#blank#}1{#/blank#}

    We had run into the current home of Wei Dajing, a 17-year-old apprentice (学徒) beekeeper who was manning his hives. Wei was fresh to the beekeeping life, and had been on the job for just two months and was here to learn from a master beekeeper. Their tent and hive set-up is always temporary{#blank#}2{#/blank#}This particular spot was stationed at a sunny patch of yellow flowers. Once these flowers die, the rubber trees will be flowering, so we will move toward them,” he told Sam.

    Like thieves in the night, the beekeepers will stealthily pack up their hives in the dark once the bees go to sleep. “They are most active around midday when they are collecting their nectar (花蜜){#blank#}3{#/blank#}Wei explained.

    The hives were humming, and bees were invasively buzzing around Wei as he spoke to us. Pieces of fruit lay drying among the hives, used to feed the bees and give them an extra boost of energy once Wei bottles up their hard-earned honey. Sam, who also has a couple of his own small hives in his backyard, tells us you must always leave a little bit of honey in the hive{#blank#}4{#/blank#}

    We waved goodbye to Wei. Back at Sam's house, he gave us a bowlful of local honey{#blank#}5{#/blank#}Lacking the usual sweetness of honey but instead rich with a more savory, spiced flavor, it tasted just like China.

A. It was smooth, thin and runny.

B. Wei skillfully collected honey from the hives.

C. Otherwise the bees get fed up and abandon you.

D. Maybe it is the flowers that give such unique taste to the honey.

E. By 10 pm they are asleep in their hives, which is when we move.

F. I asked our excellent guide and new best friend, Sam, to pull over.

G. Wei and his master move their camp as the flowers bloom and die.

    Basic first aid is a very valuable skill to have when going on a camping trip. {#blank#}1{#/blank#}

    Cuts. With small cuts, you need to be careful to keep the area of the wound clean to avoid getting infected. {#blank#}2{#/blank#} If the cut has not stopped bleeding, raise the wounded area above the heart and place pressure on the area to stop the bleeding. {#blank#}3{#/blank#} It should be held in place with tape, but should not be too tight.

    Blisters. Blisters can turn a fun walk in the woods into a terrible experience. {#blank#}4{#/blank#}

Change your bandage and socks and keep the blistered area clean. Make sure that you pack different size bandages and first aid cream.

    Sprains. If you have got a heavy pack on your shoulders, it can be very easy to twist your ankles. Walking sticks can be a traveler's friend. {#blank#}5{#/blank#} A good ACE bandage should be packed in case of a sprained ankle. This can help fix the sprained area until you can get medical attention.

    After seeing the above dangers and treatments, it's also helpful to pack a small basic first aid kit for your trip. Make sure that you include items that are unique to you and fit your environment (bleeding, bruise, snake bite, etc.).

A. They can help you keep balance on rough areas.

B. Wear comfortable shoes and socks during the trips.

C. Treat the cut with first aid cream to prevent infection.

D. They are an open wound and can get infected if not cared for.

E. Apply some cream and cover the wound with a dry, clean bandage.

F. Below is a brief list of less-severe injuries that you can prepare for.

G. Some climates can be very hot during the day and very cool at night.

    Everybody hates the idea of cutting back financially(财政上) because it usually means living without things you like. But not always.{#blank#}1{#/blank#}.They could reduce your costs by thousands of dollars a year.

    {#blank#}2{#/blank#}

    An increasing number of grocery chains are selling their own lines of food. Actually, these brands cost vastly less than the name brands, but taste the same. Switch and you could save 25 percent on your grocery bills.

    Make a list.

    Whether you're buying groceries or gifts, spur－of the－moment impulses(一时冲动)are your enemy.{#blank#}3{#/blank#}. If you want to buy something on impulse, force yourself to go home and think about it.

    Carry snacks.

    {#blank#}4{#/blank#}. The same holds true for anything you eat out. So if you know you're going to be out for several hours and likely to get hungry, throw an apple in your car or carry a six-pack of soda or water in your bag.

    Use it up.

    Before you run to the store, make sure you check your fridge. There's a good chance that you've got lots of unused or partially used items that will go to waste while you waste your cash buying more.{#blank#}5{#/blank#}.

A. Make a savings plan

B. Switch to store brands

C. There are many painless ways to save

D. Choose reliable brands of well-known companies

E. Write a to-do list before you go shopping and stick to it

F. Whether it's food or beauty care, use it up before you replace it

G. Buy a soda at a restaurant and you're likely to pay twice as much

    Rivers play an important role on the earth, and we can't imagine what the earth would be like without rivers. {#blank#}1{#/blank#}

    With a length of 6, 650 kilometers, the Nile is the longest river in the world. The Nile River has been the source of human civilization since ancient times. The Nile has two main branches—the White Nile and the Blue Nile. The White Nile starts from the Great Lakes region of East and Central Africa through Lake Victoria. {#blank#}2{#/blank#} The Blue Nile carries with it a lot of fertile soil which turns out to be very important to farming in Egypt.

    The Amazon River is the world's largest river with a width of about 40 kilometers during the rainy seasons but about 10 kilometers wide when it is not flooded. The Amazon River has such a big water volume that it accounts for(占.....比例) more than 20% of all the world's fresh water—far more than any other river. {#blank#}3{#/blank#}The main Amazon River flows mostly through Brazil and Peru but its tributaries can also be found in many other countries.

    {#blank#}4{#/blank#}It has a depth of about 250 meters. Its length is 4, 700 kilometers. The sources of the Congo River are in the highlands and mountains in the Eastern Africa Rift Valley. It's the second largest river in terms of water volume. {#blank#}5{#/blank#}The Congo River basin(盆地) is the catchments(流域，集水区) area of the Congo River. It lies in both north and south of the Equator, making its flow very stable as there are always some tributaries experiencing a rainy season at any time.

A. Some of them are worth mentioning.

B. The Congo River is the world's deepest river.

C. Do you know which is the deepest river in the world?

D. The Blue Nile originates from (发源于)Lake Tana in Ethiopia.

E. Without rivers, there would be no living life in and along them.

F. And it flows through the second largest rain-forests in the world.

G. Streams that begin in the Andes Mountains are its sources.