Read the article and select the best answer. Article: Older fathers have uglier children, researchers have claimed after linking age to genetic mutations . The finding comes weeks after leading scientists reported children born to men over the age of 45 run a higher risk of having autism and mental disorders. With age, sperm -producing cells do not copy a man's DNA as effectively, leading to genetic mutations. Martin Fielder, an anthropologist at Vienna University, told the Sunday Times: 'Every 16 years the mutation rate doubles. Other researchers found 25 mutations per sperm in a 20-year-old, but at age 40 it is 65 mutations. By 56, it doubles again. The effect is very visible - someone born to a father of 22 is already 5-10 per cent more attractive than those with a 40-year-old father and the difference grows with the age gap. In contrast, women pass on a maximum of 15 mutations to their baby, regardless of age, according to the study published in the journal Nature. Surveying a group of six men and six women, researchers showed them each 4,018 photographs of 18-20-year-old men and 4,416 of women the same age, and asked to assess their attractiveness. Those with older fathers were consistently considered less attractive. However, the children of older men, though less attractive, are likely to outlive their peers with younger fathers, it is claimed. Professor Lee Smith, a geneticist at Edinburgh University, told the Sunday Times other research found such children have longer telomeres - the caps on the end of chromosomes --- which are associated with longer life. But the mounting research connecting parents' age with autism is cause for concern, experts warn. Autism is an umbrella term for a range of developmental disorders that have a lifelong effect on someone's ability to interact socially and communicate openly. In the UK, around one in 100 adults is thought to be affected by autism, mostly men, caused by a combination of genetic and environmental factors. Researchers said men should be advised about the potential problems in order to help their personal... Question: From the passage, we know that _ . Options: A: Genetic mutations are caused by old age and physical disorders B: When a man becomes older, sperm-producing cells copy his DNA less effectively C: One of the advantages older fathers have is that their children can live a longer life D: Researchers advise men to avoid having fathering children at older ages.
B

(Question)
Read the article and select the best answer. Article: HARBIN - A wild Siberian tiger was spotted on a forestry farm in northeast China's Heilongjiang Province on Sunday, forestry officials said Tuesday. The tiger, believed to have been hunting for a wild boar at the time, came face to face with several workers late in the afternoon on a forestry farm administered by the Dongfanghong Forestry Bureau (DFB) in the eastern part of the province, said an official with the provincial Forestry Industry Bureau. The farm is located on the scarcely populated Wandashan Mountain, where wild Siberian tigers have been spotted many times, but it was the first time for such an animal to come so close to human beings. "We had just finished work in the forest when the tiger appeared." said Shi Chun, one of the workers who saw the tiger. Upon seeing the animal, the workers rushed to their tractor to avoid possible attacks. The tiger followed the tractor for several hundred meters before going away. The tiger remained mild throughout the encounter, and the workers even managed to snap a few photos of it. The pictures, though blurry due to the darkened sky, show a Siberian tiger with white hair in its face. Local authorities on Monday checked the site where the big cat was spotted and found plum-shaped paw prints, which they believe belong to a grown wild Siberian tiger. Yang Lijuan, a wild animal protection official with the DFB, said the forestry farm is a good site for wild animal reproduction. "The farm is in a zone where coniferous and broad-leaved trees grow, which provides much food for the tigers' prey, such as a boar and deer." she said. Siberian tigers, otherwise known as Amur or Manchurian tigers, mainly live in eastern Russia, northeast China and the northern part of the Korean Peninsula. It is estimated that only about 500 currently live in the wild, with about twelve in Heilongjiang Province and eight to ten in neighboring Jilin Province. The DFB has stepped efforts to increase food for wild boar, roe deer and red deer in its forestry farms where Siberian tigers have... Question: Where can you find a wild Siberian tiger probably? Options: A: Russia B: Australia C: South China D: Canada
(Answer)
A

Question: Read the article and select the best answer. Article: Did you ever look up at the moon and think you saw a man's face there?When the moon is round and full,the shadows of the moon mountains and the lines of the moon valleys sometimes seem to show a giant nose and mouth and eyes. At least,some people think so. If there were a man on the moon -- instead of mountains and valleys that just look like the face of a man -- what would he be like? He would not be like anyone you know. He would not be like anyone anybody knows. If the man on the moon were bothered by too much heat or cold the way Earth people are,he could not stay on the moon. The moon becomes very,very hot. It becomes as hot as boiling water. And the moon becomes very,very cold. It becomes colder than ice. Whatever part of the moon the sun shines on is hot and bright. The rest of the moon is cold and dark. If the man on the moon had to breathe to stay alive,he couldn't live on the moon because there's no air there.(He'd have to carry an oxygen tank,as astronauts do.) There's no food on the moon,either. Nothing grows -- not even weeds. If the man on the moon liked to climb mountains,he would be very happy. There are many high places there,such as the raised land around the holes,or craters,of the moon. Some of these _ are as tall as Earth's highest mountains. But if the man on the moon liked to swim,he would be unhappy. There is no water on the moon -- just dust and rock. When you think of what it's like on the moon,you may wonder why it interests our scientists. One reason is that the moon is Earth's nearest neighbor -- it is the easiest place in space to get to. Going back and forth between the moon and Earth,astronauts will get a lot of practice in space travel. Things learned on moon trips will be of great help to astronauts who later take long,long trips to some of the planets. Scientists are also interested in the moon because it has no air. The air that surrounds Earth cuts down the view of the scientists who look at the stars through telescopes. A telescope on the moon would give them a... Question: Which of the following statements is NOT true according to the passage? Options: A: The climate on the moon is quite different from that on the Earth. B: Traveling between the moon and Earth will do much good to astronauts. C: There is some food and weeds on the moon,even though there's no air. D: If you want to drink hot water on the moon,it's not so hard to boil water.
Answer:
C