Read the following article and select the best answer. Article: The world's oceans are slowly getting more acidic, say scientists. The researchers from California say the change is taking place in response to higher levels of carbon dioxide in the atmosphere. The lowering of the waters' pH value is not great at the moment but could pose a serious threat to current marine life if it continues, they warn. Ken Caldeira and Michael Wickett, from the Lawrence Livermore National Laboratory, report their concerns in the journal Nature. Increasing use of fossil fuels means more carbon dioxide is going into the air, and most of it will eventually be absorbed by seawater. Once in the water, it reacts to form carbonic acid. Scientists believe that the oceans have already become slightly more acidic over the last century. But these researchers have tried to predict what will happen in the future by combining what we know about the history of the oceans with computer models of climate change. "This level of acidity will get much more extreme in the future if we continue releasing CO2 into the atmosphere," said Dr Caldeira. "And we predict amounts of future acidity will exceed anything we have seen over the last several hundred million years, let alone perhaps after rare catastrophic events such as asteroid impacts ." If carbon dioxide release continues unabated , ocean pH could be reduced by as much as 0.77 units, the authors warn. It is not ly clear what that means for marine life, however. Most organisms live near the surface, where the greatest pH change would be expected to occur, but deep-ocean lifeforms may be more sensitive to pH changes. Coral reefs and other organisms whose skeletons or shells contain calcium carbonate may be particularly affected, the team speculate. They could find it much more difficult to build these structures in water with a lower pH. In recent years some people have suggested deliberately storing carbon dioxide from power stations in the deep ocean as a way of curbing global warming. But Dr Caldeira said that such a strategy should now be... Question: The purpose of this passage is to _ . - show people the findings of a research team - warn people of the higher level of CO2 - inform people of how acid the ocean is now - introduce Dr Caldeira and his team's research
warn people of the higher level of CO2

Read the following article and select the best answer. Article: Airport Information Name:Copenhagen Airport Location: Located 8km southeast of Copenhagen(capital of Denmark) No. of terminals:4 Disabled facilities: Copenhagen Airport is physically accessible throughout. Wheelchair-accessible toilets and reserved seating are provided and dedicated parking spaces are available. Passengers with disabilities are requesited to inform their airline in avdance about their needs. *Car Parking: There are more than 10,000 car parking spaces in short-, medium- and long-term car parks at Copenhagen Airport. The P6, P7, and P8 areas offer short-term options directly linked terminals 2 and 3. Medium-term rates are avaiable in P1, P2, P5, P8, P10 and P12, which are all ly near the terminal buildings. Economy long-term parking is available at P15 and P17, a little further from the terminals (free tasnsit buses sre provided). The airport parking office is located between Terminals 2 and 3 and is open 24 hours. *Public Transport Rail; There are direct high-speed trains to Copenhagen Central station(journey time: 14 minutes; fare; Kr36), as well as a number of other destination in Denmark and Sweden. The station and ticket office are situated in Terminal 3. Metro: The Metro M2 line connects to the city center (journey time: 14 minutes;fare: Kr24). The station is situated in Terminal 3, from which tickets can be purchased. Bus: Several buses(5A, 35 and 36)run from Copenhagen Airport to the city center(journey time: about 55 minutes; fare:Kr 30)and beyond. Taxi: Taxis are readily available from ranks outside the arrival areas of Terminal 1, 2 and 3. The ride into Copenhagen takes about 15 to 20 minutes, and prices start from Kr250. Question: The passage is intended to _ - give the visitors a guide to Copenhagen - inform the readers of the Copenhagen Airport - give some warnings about the Copenhagen Airport - provide information of the facilities of the Copenhagen Airport
inform the readers of the Copenhagen Airport

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Read the following article and select the best answer. Article: A speech is a wonderful opportunity to inform, persuade or entertain. The best speeches often take on a combination of all three of these components . However, before you can go about the writing of a great speech, it is important to set goals. Goals keep you,your speech and your audience focused. What a goal is In the context of a speech, a goal is the purpose of the speech, and what it hopes to accomplish. For example, the goal of a eulogy might be to celebrate the life of a loved one. The goal of a speech at a political gathering would be to inform the crowd about the political position of a candidate and persuade them to vote and campaign for the candidatein question . Why a goal is important Without a goal, a speech is without direction. The goal informs the structure and content of the speech. For example, if a speech's goal is to convince people that smoking is bad for them, the speech will be structured with persuasive arguments to back up the goal. A speech with a goal of informing the audience will keep the information fair and factual. A goal is incredibly important to the speech's ability to connect with an audience. If the speaker is unaware of the goal of the speech, the audience will likely be unaware as well. This severely reduces the effectiveness of the message. Aside from informing the audience of the content and structure, a speech's goal drives the speaker to greater heights. If a speaker is asked to speak on a specific subject, but never establishes the goal, they won't know where to start in the research, organizing and writing of the speech. _ If you have been charged with delivering a speech, establishing a goal can seem difficult at first. There are several things to take into consideration. First, think about who you will be speaking to. The demographic of your audience will likely determine whether you will be able to persuade them, or whether they will be able to sit through(......). Second, think about the topic itself. If the topic is something controversial , it may worth... Question: According to the passage, what three components does the best speech combine? - Informing, delivering and entertaining. - Informing, persuading and entertaining. - Informing, writing and delivering. - Informing, writing and persuading.
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Informing, persuading and entertaining.