Read the article and select the best answer. Article: As a result of pollution, Lake Erie, on the borders of the USA and Canada, is now without many living things. Pollution in water is not simply a matter of "poisons" killing large numbers of fish overnight. Very often the effects of pollution are not noticed for many months or years because the first organisms to be affected are either plants or plankton . These organisms are the food of fish, birds, and other creatures. When this food disappears, the fish and birds die too. In this way a whole food chain can be wiped out, and it is not until dead fish and water birds are seen at the river's edge or on the sea shore that people realize what is happening. Where do the substances which pollute water come from? There are two main sources, sewage and industrial waste. As more detergent is used in homes, more of it is finally put into our rivers, lakes and seas. Detergents harm water birds by breaking down the natural substances which keep their feathers _ Sewage itself, if not properly treated, makes the water dirty and prevents all forms of life in rivers and the sea from receiving the oxygen they need. Industrial waste is even more harmful since there are many highly poisonous materials in it, such as copper and lead. So if we want to stop this pollution, the answer is simple. Sewage and industrial waste must be made clean before flowing into the water reservoirs. It may already be too late to save some rivers and lakes, but others can still be saved if the correct action is taken at once. Question: Pollution in water is noticed _ . Options: A: when the first organisms are affected B: when many fish and birds die C: when poisons are poured into water D: As soon as the balance of nature is destroyed
B

Read the article and select the best answer. Article: You cannot say that it's entirely true that kids learn a second language easily, but it's still the best time to learn. Babies are basically equipped to hear and distinguish every possible language and dialect, but once they reach 6 months old, they begin to focus on the particular sounds that exist in the languages that they're exposed to. In this way, kids will naturally and automatically be bilingual if they hear multiple languages on a daily basis when they are still babies. One lady told me of her son who grew up in a very multi-cultural community working at a resort. He would naturally and easily switch from Dutch, to French, to Italian, German and English depending on who he was talking to. Of course that's an extreme case, but it's completely possible and easy. It's not true that they will get mixed up by learning multiple languages. They may mix them up purposely simply because certain words or expressions are easier, but they won't develop any permanent language disabilities. Quite the contrary, bilingual children have been shown to be as much as a year more advanced in learning ability development for 2 and 3 years olds. Some kids who simply aren't gifted at learning languages, just as some aren't gifted at sports or music, will find it difficult to continue schooling in a foreign language. In that case, it may be better not to continue with the foreign language school. Perhaps for Grade Two you could try a bilingual school. In any case, learning even a small amount of a foreign language, maintaining the ability to hear and pronounce it by listening to music and movies will keep a foundation for later learning. Knowing a second language can be a great benefit for gaining employment. Question: In which way can learning multiple languages benefit kids? Options: A: Mixing up different languages. B: Distinguish different dialects. C: Developing learning ability. D: Developing language disabilities.
C

Q: Read the article and select the best answer. Article: London--- A mother has criticised "selfish" passers-by for failing to help her teenage son after he fainted on a packed tram platform. Oliver Tiplady was on his way to school when he fainted at the tram stop. But instead of helping the 14-year-old, who was in school uniform,those nearby simply walked around him. Her mother, Susan Tiplady , said, "How can people leave a child for that matter, on the floor like that? How could they all have ignored him? They must have lacked any basic humanity and had no piry on a child." She said her son regained consciousness about ten minutes after fainting at the tram stop last week. "He managed to get up and sit down before his friends turned up, but by then he was too embarrassed to tell them what had happened. It wasn't until he got to school that he told a teacher." she added. BEIJING - At least 15 pupils were confirmed dead after a school bus rolled over in Xuzhou, East China's Jiangsu province. The accident occurred around 6 pm on Monday .There were 29 pupils on the bus .The bus was traveling on the road when two electric bikes suddenly cut in and the driver was trying to avoid them.. The bus was produced by Shaolin Auto Co Ltd in Henan province and had a full capacity of 52 passengers. South Korea ---South Korea's largest mobile phone operator said Thursday that it will offer cell phone users a new noise service that it says will drive away mosquitoes . SK Telecom Co. said consumers can pay 3,000 won ( ) ($2.50) to download a sound wave that can't be heard by human ears but annoys mosquitoes within a range of three feet. Customers can then play the sound just by hitting a few buttons on their mobile phones. The company claimed that the service worked during tests .The service, which begins Monday, has one drawback: it consumes as much battery power as normal cell phone rings. Question: From the passage , we can infer _ Options: A: the accident happened because of two electric bikes . B: the school bus was overloaded when the accident happened . C: the bus driver was speeding up when the accident happened . D: the bus driver was driving carelessly when the accident happened.
A: A

(Question)
Read the article and select the best answer. Article: Let us begin by saying what does not cause our dreams. Our dreams do not come from "another world ". They are not messages from outside source. They are not a look into the future , either . All our dreams have something to do with our feelings, fears, longings, wishes, needs and memories. If a person is hungry , or tired or cold , his dreams may include a feeling of this kind .If the covers on your body , such as a quilt or a blanket have slipped off your bed , you may dream that you are sleeping on the ice and snow. The material for the dream you will have tonight is likely to come from the experience you have today. So the subject of your dream usually comes from something that has effect on you while you are sleeping (feeling of cold, a noise, a discomfort, etc.) and it may also use your past experiences and the wishes and the interests you have now.This is why children are likely to dream of fairies, older children of school examinations, hungry people of food, home-sick soldiers of their families and prisoners of freedom. To show you how this is happening while you are asleep and how your needs and wishes can all be joined together in a dream , here is the story of the experiment.A man was asleep and the back of his hand was rubbed with a piece of absorbed cotton.He would dream he was in hospital and his charming girlfriend was visiting him , sitting on the bed and feeling gently his hands! There are some scientists who have made a special study of why we dream, what we dream and what those dreams mean.Their explanations of dreams , though a bit reasonable, is not accepted by everyone but it offers an interesting approach to the problem.They believe that dreams are mostly expressions of wishes that do not come true.In other words, dreams are a way of having your wishes carried out. Question: From the passage we know that our dreams _ . Options: A: are imagination of our daily life B: are man's curious look into the future C: have nothing to do with our feelings D: are to some degree connected with our feelings
(Answer)
D