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.

    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.

    If you don't think technology can improve your trip better, meet Judy. When she recently checked into the Biu Hotel in Zurich, a clerk asked her to pay hundreds of dollars higher than the online offer. It was not a cheap stay, but it became more of one after she fired up the Booking. Com app she'd used to purchase her room on her smartphone. “As soon as I showed him the rate, he honored it,” Judy says.

    Technology may create challenges for travelers-indeed, it may have led to Judy's rate confusion in the first place-but it can also solve them. The solutions go beyond making sure of a hotel rate. The latest version of Booking.com is among the most feature-rich booking programs. Users can select hotels by location, make a secure booking and view the confirmed rate.

    Another pain point for travelers is traffic that eats away precious vacation time. There's a new app for that, called Commute. As the name implies, it's aimed at users who have to make the same trip every day. Just input basic information about your destination and expected leaving time, and the app will start sending you traffic data 15 minutes before you leave.

    Another source of travel-related conflict and confusion is money. That's particularly true when you're dealing with a foreign currency. The latest version of Travel Money Tracker helps travelers prevent currency mix-ups. It instantly converts(兑换) a country's native currency to yours, so you know exactly how much that Espresso(浓咖啡) in Milan costs in dollars. One extra feature is the ability to set up an alert that tells you when you're overspending, which can sometimes be a problem when you're on vacation. The only catch, of course, is that you have to remember to record all your purchases.

    You can either travel or read, but either your body or soul must be on the way. The popular saying has inspired many people to read or go sightseeing. Here are several books we recommend that you take on your trip.

⑴ Destination: US

Recommended book: On the Road, 1957, by Jack Kerouac

    The book is a globally popular spiritual guide book about youth. The protagonist(主人公) in the book drives across the US continent with several young people and finally reaches Mexico. After the exhausting and exciting trip, the characters in the book begin to realize the meaning of life.

⑵ Destination: Sahara Desert

Recommended book: The Stories of the Sahara, 1976, by Sanmao

    The book describes the author's simple but adventurous life in the Sahara Desert, which seems a bare and dull place. The vivid natural scenery and life there, along with the author's romantic emotions will inspire you to explore the mysterious land.

⑶ Destination: England

Recommended book: The Unlikely Pilgrimage of Harold Fry, 2013, by Rachel Joyce

    The novel tells a story of a 60-year-old man who lives a boring and unhappy life, until one day, he received his old friend's letter who got cancer. In deep shock and sorrow, he went out to send his reply letter. By thinking of his life, he walked past one mailbox after another, and finally walked from the Southwest end to the Northeast end of England. 627 miles in 87 days, he walks depending on one belief that “ his friend can survive as long as he walks.”

⑷ Destination: North Europe

Recommended book: So Slow, So Beautiful, 2015, by Luo Fu

    Following a girl's step to look around North Europe, who has been living there for 10 years. Check out how North Europeans seek their happiness, which more originated from a simple, natural and tranquil mentality.

根据短文内容，选择最佳答案，并将选定答案的字母标号填在题前括号内。

阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。

    In the tenth grade，I began working for free at a vet's that was run by a friend. I wanted to get experience for what I thought would be my future job. However，on one particular Saturday morning I learnt something perhaps more important.

    The hospital was in the middle of one of the poorer sections of the city and some people could only pay for the most basic treatments. On this Saturday，a man and his young son，who was probably about 7 years old，walked in with a small cat in a cardboard box. There was something wrong with the cat's left eye. But the man could not afford to pay for the cost of the medicine. He kept quiet for a while，and then he asked where the nearest animal shelter was. Hearing this，his son cried and started to argue with him. All of a sudden，an older woman who was sitting in the waiting room stood up，walked up to the counter，and told the man that she would pay for the cost. The man thanked her and the son got to keep a healthy cat.

    I always thought it was the right thing to help out a needy person，but I only saw people do acts of kindness on TV or in movies. What the woman did made me believe that these things do happen in real life，and quite often.

Now，when I can't decide whether to help someone who is in need，I remember this woman，and then I have the courage to step up to the plate. Sometimes other people follow.

    Welcome to SummerCamps.com; find and book the very best summer camps. Your children are precious so we offer the highest quality of camps that will meet each child's needs and interests.

    Catalina Sea Camp

    Sea Camp offers three one-week sessions to boys and girls aged 8-13 and two three-week sessions to teens aged 12-17. Our hand-picked instructors create an atmosphere of fun and excitement while leading campers to a host of ocean adventures, marine(海洋的) biology, and social summer camp activities.

    Address: Toyon Way, San Bruno, California 94066

    Phone: 800-645-1423

    Camp Cayuga

    Camp Cayuga is a private summer camp for children aged 6 to 16. The camp is on a 350-acre land in the Pocono Mountains of Northeast Pennsylvania, just outside the village of Honesdale. It's a 3-hour drive from New York City and Philadelphia.

    Address: 321 Niles Pond Road-Suite ISC, Honesdale, Pennsylvania 18431

    Phone: 908-470-1224

    Camp Rockmont

    Camp Rockmont is a Christian summer camp for boys, aged 6-16, in the Blue Ridge Mountains of North Carolina. Rockmont's duty of developing boys into healthy young men is accomplished through age-appropriate skills, activities, and challenges that help campers to know themselves better.

    Address: 375 Lake Eden Road， Black Mountain, North Carolina 28711

    Phone: 828-686-3885

    Primitive Pursuits Overnight Camps

    Primitive Pursuits Overnight Camps offer week-long Summer Adventure Overnight Camps in New York's Finger Lakes to your children aged 11-15. Campers experience a week of nature-based skills training, inspiring challenges, and fun activities under the guidance of skilled instructors.

    Address: 611 County Rd 13, Van Etten, New York 14889

    Phone: 607-272-2292

    Last year marked the 100th anniversary of the end of World War I. There were events around the world in memory of those who died in the conflict. We have picked out three of them inEuropean countries. Let's take a look.

    Belgium

    In a park, the famous Belgian artist Koen Vanmechelen had an exhibition called Coming World, Remember Me. The work consisted of 600,000 individual(个别的) clay sculptures, one for each person killed during the World War. In the center of the exhibition was a big egg made of clay, symbolizing a new world.

    UK

    In a small town called Aldridge, almost 100 houses in one street were covered with 24,000 poppies and statues of soldiers. They stood for the men from the area who had been' killed in the war. The flowers were chosen because of a poem written by the Canadian doctor John McCrea in 1915. They made people think of fields of blood.

    France

    The British artist Guy Denning arrived in La Feuille, a small town in the northwest of France, to stick life-size drawings of soldiers who never came back home. Armed with glue and a brush, Denning stuck his drawings carefully on walls. Before long 112 men, mainly young adults, were brought back to mind, if not to life.