Read the following article and select the best answer. Article: Elephants might be the most well-known and well-loved animal in African wildlife. But conservation of the African elephant faces special difficulties. While the elephant population is half of what it was 40 years ago, some areas of Africa have more elephants than populated areas can support. That's why AWF scientists are studying elephant behavior, protecting habitats and finding ways for humans to live peacefully with elephants in Africa. Years ago, over hunting and the ivory trade were the biggest threats to elephants survival. Luckily, ivory bans , hunting rules and protected areas protect elephants from these dangers today. The 21st century brings a different challenge to elephant conservation --land-use. Elephants walk across borders and outside parks and other protected areas. So they often destroy crops, causing conflicts between local farmers and these big animals. Successful conservation strategies must allow elephants to walk freely in their natural habitats while reducing conflicts between elephants and local people. AWF researchers are searching for a way to give both elephants and people the space they need. The AWF is collecting information on elephant habitats and behavior. The information they gather will help to develop the widest possible space for elephants. The AWF is helping elephants by protecting their habitats. And they also work with local farmers to improve their life in order to encourage them to protect rather than destroy elephants. Question: What is the biggest difficulty in protecting African elephants now? - They are still being killed. - Their habitats are being destroyed. - They don't have enough food. - They can't live in peace with farmers.
They can't live in peace with farmers.

Read the following article and select the best answer. Article: The customs in different countries are rather different. If I have dinner with a Chinese host, he always puts more food onto my plate as soon as I have emptied it. That often discomforts(......) me greatly. I have to eat the food even if I do not want to. I have also noticed that when a Chinese sits at an American's dinner party, he very often refuses the offer of food or drink though he's in fact still hungry or thirsty. This might be good manners in prefix = st1 /China, but it is not in the West at all. In theUnited States, it is impolite to keep asking someone again and again or insist on his accepting something. Americans have a direct way of speaking. If they want something, they will ask for it. If not, they will say, "No thanks." When an American is served with beer by the host, for example, he might say, "No, thanks. I'll take some orange juice if you have it." That is what an American will do. So when you go to theUnited States, you'd better remember the famous saying: "When inRome, do as Romans do." Question: A guest at an American's dinner party should show his politeness by _ . - not eating up all the food offered - putting more food onto his plate as soon as he has emptied it - refuse the offer of food or drink though he is still hungry or thirsty - asking for things directly if he wants
asking for things directly if he wants

Q: Read the following article and select the best answer. Article: If you'd like to go sightseeing, the following World Heritage Sites may be your best choices. Jiuzhaigou Valley Scenic and Historic Interest Area The Jiuzhaigou Valley, which lies in the northern part of Sichuan Province, reaches a height of more than 4,800 meters, with a series of different forest ecosystems . There you can enjoy watching excellent waterfalls. Some 140 kinds of birds also live in the valley, as well as a number of endangered plants and animals, including the giant panda. For more information, please visit http://whc.unesco.org/en/list/637. Khami Ruins National Monument The city of Khami, which developed after the capital of Great Zimbabwe had been given up in the mid-16th century, is of great archaeological interest. The discovery of objects from Europe and China shows that Khami was a major centre for trade over a long period of time. For more information, please visit http://whc.unesco.org/en/list/365. Henderson Island Henderson Island, which lies in the eastern South Pacific, is one of the few atolls in the world whose ecology has not been touched by human beings. It is especially famous for the ten plants and four land birds that can only be seen on the island. For more information, please visit http://whc.unesco.org/en/list/487. The Old City of Jerusalem As a holy city for three different religions in the Middle East, Jerusalem has always been of great religious importance. It was given a World Heritage Status in 1981 and placed on the "List of World Heritage in Danger" the following year. For more information, please visit http://whc.unesco.org/en/list/148. Question: From the passage we can learn that Henderson Island _ . - hasn't been greatly influenced by human activities - isn't suitable for humans to live on - has been open to visitors for years - is made up of a few large atolls
A: hasn't been greatly influenced by human activities

Q: Read the following article and select the best answer. Article: Bottled water is a _ on the environment: The US public goes through about 50 billion water bottles a year, and most of those plastic containers are not recycled, according to Elizabeth Royte's bookBottlemania: How Water Went on Sale and Why We Bought It. Transporting the bottles and keeping them cold also burns fuels, which give off greenhouse gases. And groundwater pumping by bottled water companies draws heavily on underground aquifers and harms watersheds , according to the Sierra Club. And some studies suggest it takes up to three liters of water to produce one liter of bottled water. Yet more than $100 billion is spent every year on bottled water globally. In many cities in developing countries where there is not a safe source of tap water, bottled water becomes a trusted choice. In the US, tap water is controlled by the government and often examined for dangerous polluted substances. Each American drinks 79 liters of bottled water per year on average, according to the Columbia Water Center at Columbia University's Earth Institute in New York. The bottled water industry is so successful that it has outpaced milk, coffee, and juice in the number of gallons of drinks sold -- putting it behind only beer and soda. Though the sale and consumption of bottled water is still on the rise, certain policymakers have taken steps to reduce it and encourage people to drink tap water. In September 2009, the Australian town of Bundanoon became the first town in the world to completely ban bottled water from its stores' shelves, building water fountains around the town instead. Among US cities that have taken action are San Francisco and Seattle, which no longer buy water for city use, and Chicago, which added a five-cent tax on each bottle. Several restaurants in those cities have also given up bottled water for tap water. Other cities are also considering taking action. Question: According to the passage, what drink sells best in the USA? - Beer - Bottled water - Coffee - Milk
A: Beer