Read the article and select the best answer. Article: Fish species are expected to shrink in size by up to 24% because of global warming, say scientists. The scientists argue that failure to control greenhouse gas emissions will have a greater effect on marine ecosystems than previously thought. Previous research has suggested that changing ocean temperatures would affect both the distribution and the reproductive abilities of many species of fish. This new work suggests that fish size would also be heavily affected. The researchers built a model to see how fish would react to lower levels of oxygen in the water. As ocean temperatures increase, so do the body temperatures of fish. But, according to lead author, Dr William Cheung, from the University of British Columbia, the lower level of oxygen in the water is key. Warmer waters could decrease ocean oxygen levels and greatly reduce fish body weight. On the other hand, rising temperatures directly increase the metabolic rate of the fish's body function. This leads to an increase in oxygen demand for normal body activities. So the fish will run out of oxygen for growth at a smaller body size. The research team also used its model to predict fish movements as a result of warming waters. The group believes that most fish populations will move towards the Earth's poles at a rate of up to 35km per decade. "So in, say, the North Sea," says Dr Cheung," one would expect to see more smaller-body fish from tropical waters in the future." Taking these factors into consideration, the research team concludes that fish body size will shrink between 14% and 24%, with the largest decreases in the Indian and Atlantic oceans. When compared with actual observations of fish sizes, the model seems to _ what's actually happening in the seas. The researchers looked at two case studies involving North Atlantic cod and haddock. They found that recorded data on these fish showed greater decreases in body size than the models had predicted. Dr Alan Baudron, from the University of Aberdeen, UK, believes smaller-sized fish could seriously... Question: What's the main idea of the passage? Options: A: Global warming makes fish smaller. B: Global warming makes fish decrease in numbers. C: Global warming affects the fish distribution. D: Global warming affects the ability of fish to reproduce.
A

Read the article and select the best answer. Article: As we all know , the language is a very important tool for people to communicate with each other. In most of the languages , people usually begin their conversations by a kind of small talk -a casual form of conversation that "breaks the ice" or fills an awkward silence between people . That is to say , small talk means the little things we talk about to start a conversation . In English-speaking countries such as Britain, people often make small talk about the weather. " Nice day, isn't it?" "Terrible weather , isn't it?" However, we still have something special about small talk. It must be about something which both people have the same opinion about. The purpose of small talk is to let both people agree on something. This makes meeting people easier and more comfortable . People usually agree about the weather, so it is a safe topic for small talk. But people often disagree about religion or politics so these are not suitable topics for small talk. The topics for small talk also depend on where the conversation is taking place. At basketball matches, people make small talk about the game they are watching. "Great game , isn't it?" At train stations, people may talk about the transport system . " The train service is terrible, isn't it?" Question: What can we learn from the passage ? Options: A: Different languages have different grammar B: We must have something special about small talk. C: Small talk is an important part of a language . D: in English-speaking countries we should talk abut the weather.
C

Q: Read the article and select the best answer. Article: Can people change their skin colour without suffering like pop king Michael Jackson? Perhaps yes. Scientists have found the gene that determines skin colour. The gene comes in two versions, one of which is found in 99 per cent of Europeans. The other is found in 93 to 100 per cent of Africans, researchers at Pennsylvania State University report in the latest issue of Science. Scientists have changed the colour of a dark-striped zebra fish to uniform gold by inserting a version of the pigment gene into a young fish. As with humans, zebra fish skin colour is determined by pigment cells, which contain melanosomes . The number, size and darkness of melanosomes per pigment cell determines skin colour. It appears that, like the golden zebra fish, light-skinned Europeans also have a mutation in the gene for melanosome production. This results in less pigmented skin. However, Keith Cheng, leader of the research team, points out that the mutation is different in human and zebra fish genes. Humans acquired dark skin in Africa about 1.5 million years ago to protect bodies from ultra-violet rays of the sun, which can cause skin cancer. But when modern humans leave Africa to live in northern latitudes, they need more sunlight on their skin to produce vitamin D. So the related gene changes, according to Cheng. Asians have the same version of the gene as Africans, so they probably acquired their light skin through the action of some other gene that affects skin colours, said Cheng. The new discovery could lead to medical treatments for skin cancer. It also could lead to research into ways to change skin colour without damaging it like chemical treatment done on Michael Jackson. Question: Which of the following is NOT mentioned according to the passage? Options: A: The version of the pigment gene of Asians and that of Africans are the same. B: Scientists have succeeded in turning the colour of a dark-striped zebra fish into uniform gold. C: Dark skin can protect bodies from utral-violet rays of the sun. D: People like pop king Michael Jackson.
A: D

*Question*
Read the article and select the best answer. Article: A small man with a fat stomach got on the train at the last station before the frontier . He carried a paper bag. And four feet ducks could be seen under the cover. The man found an empty seat, put the bag in the middle of the floor, took out a newspaper and began to read. Then a policeman came in. Of course he saw the bag with ducks' legs at once and said, "Whose is that bag?" Nobody answered. The policeman repeated the question, and said, "I'll have to take it away from the owner. Food mustn't be taken out of the country." "Well, then," said the small man with a fat stomach. "Hurry up and take it. We want to go home." The policeman took the bag and went on to the next carriage. At the next station, when they were safely across the frontier, the small man got up, smiled at the other passengers and said, "I hope they'll enjoy the ducks' feet. The rest of the bag had nothing but rubbish in it." Then he opened his coat and pointed to another bag he was carrying under it. It was tied tightly over the stomach, which was not really fat. "I have the rest of the two ducks here," he said. With these words, he got off the train. But while he was happily walking to the exit with the bag in his hands, a policeman came up to him, saying, "Hey, man! Foreign food mustn't be brought in." Question: The first policeman took the paper bag away because _ . Options: A: he wanted to find the owner of the bag B: he enjoyed the ducks feet in the bag C: the bag was put in a wrong place in the carriage D: food can't be taken abroad
**Answer**
D