Swedish businessman Nile Bergqvist is delighted with his new hotel, the world's first igloo(冰屋) hotel.

    {#blank#}1{#/blank#}(build) in a small town, it has been attracting lots of visitors but soon the fun will be over. In two weeks' time Bergqvist's ice creation {#blank#}2{#/blank#}(be) nothing more than a pool of water. “ We don't see it as a big problem,” he says. “ We just look forward to replacing it.”

    Bergqvist built his first igloo in 1991 for an art exhibition. It was {#blank#}3{#/blank#}successful that he designed the present one,{#blank#}4{#/blank#} measures roughly 200 square meters. Six workmen spent more than eight weeks {#blank#}5{#/blank#}(put)1, 000 tons of snow onto a wooden base；when the snow froze, the base {#blank#}6{#/blank#}(remove).

After their stay, all visitors receive {#blank#}7{#/blank#}(congratulate) and a survival certificate recording their success.{#blank#}8{#/blank#} no windows, nowhere to hang clothes and temperatures below 0℃, it may seem more like a survival test {#blank#}9{#/blank#}a relaxing hotel break. “It's great fun,” Bergqvist explains, “As well as a good start in survival training.”

    The popularity of the igloo is beyond doubt：it is now attracting tourists from all over the world. At least 800 people have stayed at the igloo this season even {#blank#}10{#/blank#} there are only 10 rooms.

    A group of classmates got together to visit their old teacher. These classmates all had good jobs and made lots of money. They talked {#blank#}1{#/blank#} (happy). The teacher asked them the difficulty they had{#blank#}2{#/blank#} (achieve) their dreams. Then their talk soon turned to complaining about the stress in work and life. The teacher went to {#blank#}3{#/blank#} kitchen and came back with a large pot of coffee and many cups-china ones, plastic ones and glass ones. Some are plain looking, some are expensive and some are lovely. The teacher told them to help {#blank#}4{#/blank#}(they)to the coffee.

    When all the students had a cup of coffee in hand, the teacher said, “Can you notice that all of you took nice-looking expensive cups, leaving {#blank#}5{#/blank#} the plain and cheap ones? You want only the best for yourselves,{#blank#}6{#/blank#}is the source of your problems.”

    “What all of you really wanted was coffee, not the cup,{#blank#}7{#/blank#} you went for the best cups and then began looking at each other's cups.”

    “Now think about this: life is the coffee, and the jobs, money and position in society {#blank#}8{#/blank#} (be) the cups. They are just {#blank#}9{#/blank#} (tool) to hold, and do not change the life. Sometimes, by caring only about the cups, we fail {#blank#}10{#/blank#}(enjoy) the coffee. So don't let the cups drive you, and enjoy the coffee instead.”

    Every time your fingers touch your cell phone, they leave behind trace of amounts of chemicals. And each chemical offers clues to you and your activities. By studying them, scientists might be able to piece together a story about your recent life, a new study finds.

    A molecule (分子) is a group of atoms. It is the smallest amounts of some chemicals. Your skin is covered in molecules picked up by everything you touched. With each new thing your skin contacts, you leave behind some small share of what it'd touched earlier.

    Researchers at the University of California, San Diego (UCSD) recently studied such chemical leftovers on the phones of 39 volunteers. The study was led by biochemist Amina Bouslimani. To explore those residues (剩余物), the UCSD team wiped the surface of each volunteer's phone with a cotton swab (药签). The scientists also swabbed each person's right hand. Then the researchers compared the chemicals found on each cell phone.

    The scientists discovered as many of the molecules as they could. They then compared those to a database of chemicals. Pieter Dorrestein, a UCSD pharmaceutical chemist, had helped set up that database a few years earlier, which contains various substances, including spices, caffeine and medicines.

    Traces of everything from hundreds to thousands of different molecules turned up on each phone. The molecules suggested what had been in the body, and what each person had handled before touching the phone. From all these molecules, Bouslimani says, “We could tell if a person is likely female, uses high-end cosmetics (化妆品), colors her hair, drinks coffee, prefers beer over wine or likes spicy food.”

    Police already use molecular analyses to look for traces of explosives or illegal drugs. To date, Dorrestein says, he's never heard of police using phone residues to narrow down behaviour clues to search for a suspect. But detectives might one day use such data to track down someone who left a phone behind at a crime scene.

    Three-quarters of the world's coffee farms destroy forest habitat to grow coffee in the sun and typically use harmful pesticides (杀虫剂) and chemicals that poison the environment. When forests disappear, migratory (迁徙的) songbirds disappear, too. In order to deal with severe population and habitat loss, Smithsonian scientists created the Bird Friendly certification.

    Bird Friendly coffees are shade-grown, meaning the coffee is planted under trees, rather than on the land that has been cleared of all other plants. Coffee experts say shade-grown coffees taste better, because the beans ripen slower than coffee grown in the full sun, resulting in a richer, more complex flavor. Bird Friendly certified coffees grow under bio-diverse shade that provides habitat for migratory songbirds and other wildlife, stores carbon and fights climate change. Bird Friendly coffees are also certified organic, meaning they are grown without pesticides, which is better for people and for the planet.

    Bird Friendly producers can also earn more for their crops. The wood and fruit trees on shade coffee farms provide farmers with additional income. Every cup of Bird Friendly coffee purchased rewards these farmers with a little more money for being good stewards of the environment and encourages them to continue conserving Bird Friendly habitat.

    Buying Bird Friendly supports the Smithsonian Migratory Bird Center's conservation research aimed at understanding and protecting your feathered friends. You can purchase Bird Friendly certified coffees around the world and protect wildlife and habitat with every cup. Find a store or cafe near you, or better yet, have it shipped to your door when you order online.

    The man who is going to fix our roof must be {#blank#}1{#/blank#}(honest) person my husband and I have ever met.

    My husband knew the back roof of the porch was fine and wanted {#blank#}2{#/blank#}(see) what this roofer would say when he gave his estimate. He told my husband that the back roof was just fine and then gave the estimate for the rest of the roof:$2,400.

    He called last night to tell us he could do the roof on Monday but {#blank#}3{#/blank#}(tell) us he had measured the roof {#blank#}4{#/blank#}(correct) by forgetting to add on the front part of the roof.{#blank#}5{#/blank#} instead of giving us a new estimate, he told us he {#blank#}6{#/blank#}(go) to do the roof for what he quoted us.

    My husband asked him what the correct estimate would {#blank#}7{#/blank#}(be).He said,"$3,000."Well, that's what I had thought it would be so that's {#blank#}8{#/blank#} I set aside. My husband was simply {#blank#}9{#/blank#}(amaze) at this roofer.

    The roofer doesn't know our decision that he'll get the $3,000.He's honest and is planning to be responsible for the mistake. My boss was kind to me when I made some {#blank#}10{#/blank#}(mistake) in the past and now I get a chance to pass this on to others.