Read the article and select the best answer. Article: Joker found one of the biggest diamonds in the world in his own back yard. He sold the stone to a diamond dealer for over three hundred thousand dollars. In New York, the diamond was resold. This time for almost eight hundred thousand dollars. The true value of a diamond is never known until it has been cut. Once cut successfully, its value can increase a thousand times. It's easy to understand why the owner of the Joker diamond went to the best diamond cutter he knew, Kaplan. The cutter studied the diamond for twelve whole months. When he felt he was ready to start work, he discovered a flaw . He had to begin with his calculations all over again, or he might have made the stone useless. Six more months passed, and Kaplan finally said to the owner, "I m ready to start my work. There will be one excellent diamond that be comparable to any in the world, plus eleven small diamonds of first-class quality." Kaplan waited a few more days until be felt he was in the best physical and mental condition possible. He picked up his tools and held his breath as he made the first blow. The diamond split exactly as he promised. Question: The owner of the diamond thought that if the diamond was cut successfully it might be worth _ . Options: A: $300,000 B: $500, 000 C: $300, 000,000 D: $800, 000, 000
D

Read the article and select the best answer. Article: Scientists at Harvard University and Bates College find female chimpanzees appear to treat sticks as dolls, carrying them around until they have children of their own. Young males engage in such behavior much less frequently. The new work by Sonya M. Kahlenberg and Richard W. Wrangham, described this week in the journal Current Biology, provides the first evidence of a wild nonhuman species playing with dolls, as well as the first known sex difference in a wild animal's choice of playthings. The two researchers say their work adds to a growing body of evidence that human children are probably born with their own ideas of how they want to behave, rather than simply mirroring other girls who play with dolls and boys who play with trucks. Doll play among humans could have its origins in object--carrying by earlier apes , they say, suggesting that toy selection is probably not due entirely to socialization. "In humans, there are obvious sex differences in children's toy play, and these are remarkably similar across cultures," says Kahlenberg. "While socialization by elders and peers has been the primary explanation, our work suggests that biology may also have an important role to play in activity preferences." In 14 years of data on chimpanzee behavior at the Kibale National Park in Uganda, Kahlenberg and Wrangham counted more than 100 examples of stickcarrying. Some young chimpanzees carried sticks into the nest to sleep with them and on one occasion built a separate nest for the stick. "We have seen juveniles occasionally carrying sticks for many years, and because they sometimes treated them rather like dolls, we wanted to know if in general this behavior tended to represent something like playing with dolls," says Wrangham, a Professor at Harvard. "If the doll hypothesis was right, we thought that females should carry sticks more than males do, and that the chimpanzees should stop carrying sticks when they had their first child. We have now watched enough young chimpanzees to prove both points." Question: It can be concluded from the passage that _ . Options: A: both humans and chimpanzees choose their playthings due to sex difference B: different factors cause humans and chimpanzees to choose different playthings C: only female chimpanzees have playthings D: chimpanzees usually choose playthings for their children
A

Q: Read the article and select the best answer. Article: The gray-haired lady can't wait to leave the building to search for her dad. Unless watched, she will walk in the streets in an effort to find her father, who died 30 years ago. Not all cases of Alzheimer's disease look like this, but Alzheimer's is a serious disease that is said to be the fourth or fifth leading cause of death for people over age 75. It is said that about three percent of the U.S. population over age 65 have Alzheimer's. In the early stages, people may exhibit short-term memory loss. Some may experience changes in personality, easy to be angry. As the disease progresses, patients might lose the ability to move and may be unable to speak or move at all. This progressive disease generally lasts 8 to 10 years before death occurs. While no one is certain what causes these changes in the brain's nerve fibers , their effect is certain. Alzheimer's destroys not only the patients, but also spouses , friends and families. What should you do if you notice progressive memory loss in yourself or a loved one? Have the person examined by a doctor who is a specialist in the treatment of Alzheimer's disease? Though many reasons other than Alzheimer's disease may cause memory loss, its early diagnosis and treatment may delay some of the most serious effects. What feeling will you likely experience if a loved one suffers from Alzheimer's disease? A person will often go through the various stages of sadness, shock, anger, and so on. If the spouse develops the disease, you may experience hurt and disappointment when he or she doesn't remember you are married. Life for the Alzheimer's patients and their loved ones will never be the same as the disease progresses, bringing a deep sorrow, loss and even anger towards God. No matter what feelings are present, facing them honestly will serve one better than burying them. Question: What can be inferred from the passage about the gray-haired day? Options: A: She has been living with her father. B: She was sad about the death of her father. C: She can't search for her father without being watched. D: She suffers from Alzheimer's disease.
A: D

Read the article and select the best answer. Article: Internet dating has become one of the biggest and most successful business ventures on the Internet.Basically,Internet dating is a way to meet people for either friendship or dating without actually having to meet them in person first. The first thing to do if you decide to try Internet dating is to build your profile which can include your hobbies,hopes for the future,and so on.A photograph is optional,but many sites claim that a photograph increases the number of people who look at your profile. Many Internet dating sites will charge a one-time registration fee to use their services. Internet dating makes it possible to meet people from all over the world. You call even narrow the search down to your area by zip code.Another advantage is that you can communicate by email before you meet in person.Thousands of people have met,fallen in love,and married through Internet dating.It is an excellent way for shy people to meet.It is also a way for people with busy lives to connect with others,and an easy way to meet people who share your interests. Just as in conventional dating and love,there are some pitfalls to be aware of in Internet dating.The person you have been talking to on the net may not be who they say they are. Be very aware that there are some people who misrepresent their appearance or private details,such as marital status,income,and so on,for their own reasons.It would not be the first time that someone has been taken in, and talk shows are full of cheating partners who have been caught dating over the Internet in their spare time.Nevertheless,taking a few simple precautions should help ensure that your Internet dating experience is fun. Question: The purpose of writing the passage is to _ . Options: A: persuade readers to go dating on the Internet B: inform us how to date on the Internet C: warn readers against web love D: introduce Internet dating to us
D