Read the article and select the best answer. Article: Everybody hates it, but everybody does it. A recent report said that 40%of Americans hate tipping. In America alone, tipping is a $16 billion-a-year industry. Consumers acting politely ought not to pay more than they have to for a given service. Tips should not exist. So why do they? The common opinion in the past was that tips both rewarded the efforts of good service and reduced uncomfortable feelings of inequality. And also, tipping makes for closer relations. It went without saying that the better the service, the bigger the tip. But according to a new research from Cornell University, tips no longer serve any useful function. The paper analyzes numbers they got from 2,547 groups dining at 20 different restaurants. The connection between larger tips and better service was very weak. Only a tiny part of the size of the tip had anything to do with the quality of service. Tipping is better explained, by culture than by the money people spend. In America, the custom came into being a long time ago. It is regarded as part of the accepted cost of a service. In New York restaurants, failing to tip at least l5% could well mean dissatisfaction from the customers. Hairdressers can expect to get l5%-20%, and the man who delivers your fast food $2. In Europe, tipping is less common. In many restaurants the amount of tip is decided by a standard service charge. In many Asian countries, tipping has never really caught on at all. Only a few have really taken to tipping. According to Michael Lynn, the Cornell papers' author, countries in which people are more social or outgoing tend to tip more. Tipping may reduce anxiety about being served by strangers. And Mr. Lynn says, "In America, where people are expressive and eager to mix up with others, tipping is about social approval. If you tip badly, people think less of you. Tipping well is a chance to show off." Question: This passage is mainly about _ . Options: A: different kinds of tipping in different countries B: the relationship between tipping and custom C: the origin and present meaning of tipping D: most American people hate tipping
C

Read the article and select the best answer. Article: There are only 24 hours in a day,but people can use the time wisely. In other words,effective time management is important if you want to succeed. Knowing the importance of daily matters is the first step towards good time management. Write down the things that you want to do and organize them according to their level of importance. The important thing should be done first. If there are too many things that have to be done in one day, then you have to give up doing something that is less important on your list. Besides this,you need to spend a specific amount of time doing all the activities you have written down and make sure you finish them on time. People often slow down in their work even though they know that time will never wait for them. Make sure you keep to your plan and finish the tasks one by one. Do not try to do too many things at once. Also,you can group similar activities together and do them one by one. For example, you can group all the tasks you need to do in the office together and do them while you're in office. Do all the tasks that have to be done in one place first, and then move to the next place to do the other tasks. "The bad news is that time flies. The good news is that you're the pilot, "said Michael Althsuler. Your future is in your hands,so remember to invest your time wisely from today on. Question: Which of the following ideas would the author agree with? Options: A: Never give up doing the least important things B: Successful people can make a day last longer than 24 hours C: Writing down daily tasks is the first step towards success D: Effective time management can help one to succeed
D

*Question*
Read the article and select the best answer. Article: With a wildlife guide, I stepped on a journey to find one of the rarest creatures in the world ----the spirit bear, a walking contradiction--a white black bear. Neither albino nor polar bear, the spirit bear is a white variant of the North American black bear, and it's found almost exclusively here in the Great Bear Rainforest. At 25,000 square miles ---- one and a half times as big as Switzerland--the region is a spooky , wild, mysterious place: there are wolves here that fish. Deer that swim. Western red cedar trees that have stood a thousand years. And a black bear that is white. Scientists know how black bears are born white. They're just not sure why. The phenomenon, known as Kermodism, is caused by a recessive mutation at the MC1R gene, the same gene associated with red hair and fair skin in humans. To be born white, a bear must inherit the mutation from both parents. The parents themselves don't have to be white. They just need to carry the recessive mutation. So it's not uncommon for white bears to be born to black parents. White fur happens in only one of every 40 to 100 black bears on the British Columbia mainland coast, but the feature is especially distinct on certain islands in the Great Bear Rainforest. For example, on Princess Royal Island, one in ten black bears is white, and on Gribbell Island, directly north of Princess Royal, it's one in three. It's unclear how the feature arose. One theory was the "glacial bear" hypothesis that the spirit bear represented a remaining adaptation from the last great ice age, which ended here 11,000 years ago. At that time most of modern-day British Columbia was still icebound, and a white coat may have offered camouflage . But the "glacial bear" theory raised a question: Why didn't the white fur feature die out when the glaciers _ ? Researchers have recently proved that the spirit bear's white coat gives it an advantage when fishing. Although white and black bears tend to have the same success rate after dark, there is a difference during the... Question: Which of the following about the spirit bear is NOT true? Options: A: It is a kind of polar bear. B: It is a white variant of the North American black bear. C: It is a walking contradiction. D: It's found mainly in the Great Bear Rainforest.
**Answer**
A