Read the article and select the best answer. Article: The Big Brother in the novel 1984 listens to everything and nothing can escape his ears . Now in reality , we have Facebook . The social media giant has never denied that it's keeping track of conversations you have near your phone ( if the Facebook app is open , that is ) , but not , one expert has told NBC that Mark Zuckerberg's empire may be keeping ears on you at a more regular basis . According to Professor Kelli Burns , who teaches mass communication at the University of South Florida , it may be listening more often than it lets on . To prove her point , Burns turned on the microphone feature on her phone , and said , " I'm really interested in going on an African journey . I think it'd be wonderful to ride in one of those jeeps . " Less than a minute later , when she checked her Facebook page , she was met by a story about a journey - the first post on her newsfeed . There was also a car ad on her page . While Facebook says that it's only keeping its ears open to help " identify the music you're listening to and TV matches you're watching , " Burns' little experiment suggests that there may be other motivations at play as well . But the social media company has denied claims that it records any conversations , and told The Independent , " Facebook does not use microphone audio to inform advertising or News Feed stories in any way . Businesses are able to serve related ads based on people's interests and other statistic information , but not through audio collection . " Whether you believe this statement or not , there are ways to stop Facebook from listening in at all . Simply turn off your phone's microphone by heading over into Settings ( if you're an iPhone user ) , going to the Privacy tab , then clicking on Microphone . From there , you can remove Facebook's mic privileges , and probably , stop the company from hearing your conversations . On Android , you can also go to Privacy under the Settings tab , and change Facebook's permissions . So the next time you're chatting with your friends about... Question: What might Facebook do if it is turned on ? Options: A: Chat with you like a real friend . B: Turn on your phone's microphone . C: Identify the movie you are watching . D: Show ads based on your conversation .
D

Read the article and select the best answer. Article: By 2050, half of the world's population will live in the tropics--the ly warm belt that circles the globe--according to State of the Tropics, a report released today. Rapid population growth, along with economic growth, means that the region's influence will grow in coming decades, the authors of the 500-page work predict. The project, first launched in 2011, aimed to answer one significant question: Is life in the tropics improving? To find out, the researchers analyzed environmental, social, and economic indicators collected over 6 decades. It finds that the region has made "extraordinary progress" in many areas. For example, more people have access to safe drinking water, and the number of protected areas is increasing. The tropics also have outperformed the rest of the world in economic growth over the past 30 years. However, some challenges remain. Investment in research and development, for example, has increased cautiously, but tropical nations still invest less than the rest of the world. "As a proportion of GDP the Rest of the World invests almost four times as much in research and development than the Tropics." concludes the report. The report also includes a new analysis of how climate change will affect the region. Many plant and animal species are moving poleward in an attempt to stay within their preferred environmental conditions in the tropics, the authors write. However, some organisms may not be able to keep pace with the changing conditions, they predict. As a result, they can experience population declines or go extinct. In addition, an expanded tropical zone also threatens health and safety issues, the authors warn. As regions become more suitable to insects such as mosquitoes and ticks, the spread of insect-borne diseases such as malaria, dengue, and Lyme disease could rise, causing a burden to human health and the economy. Bruna, a researcher, says he sees a lot to be concerned about in the report. "While we've made incredible advances in some areas, I think the risks for the tropics... Question: What was the original purpose of the project State of the Tropics? Options: A: To answer if life in the tropics is improving. B: To do research about environment, society and economy. C: To warn people of the problems in coming decades. D: To help the development in the tropics.
A

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Read the article and select the best answer. Article: Visitor's Guide KL HOP-ON HOP-OFF gives you an easy city tour that has 22 stops, which cover more than 40 attractions. All buses are equipped with 9 different languages to choose from and a friendly customer service officer will help you on the bus. KL HOP-ON HOP-OFF City Tour offers you a convenient way to discover Kuala Lumpur where tourists can either stay on the bus for the full tour circuit , or get on or get off at any of the attractions. 2. The interval between buses is around 20 to 30 minutes. 3. We operate 365 days per year including school holidays and public holidays. 4. Tickets can be bought from the bus itself, authorized agents, authorized hotels and KL Hop-On Hop-Off counters. 5. Our counters are located at Jalan Bukit Bintang (main counter at stop number 6), Malaysian Tourism Centre at Jalan Ampang, at KL Sentral (arrival hall) and at Central Market. 6. We have 24-hour and 48-hour tickets to choose from. 7. Children below 5 years old do not have to pay any fees. 8. A child below the age of 12 must be accompanied by an adult. 9. The Do's & Don'ts: * No littering on the bus * No food and drink allowed inside the bus * Visitors are not allowed to exchange tickets * Visitors are welcome to take pictures * Please use electronic devices with care * No smoking allowed 10. Advice: * Please avoid changing from one bus to another on during peak hours usually from 4 PM to 6 PM. During that time you could take a rest and walk around the attractions. * The weather is unpredictable in Kuala Lumpur. Delays may occur because of bad weather. * Please buy _ only from authorized agents. Ticket Ticket Type: STANDARD ADULT TICKET Price: RM45.00 Validity: 24 Hours Price: RM79.00 Validity: 48 Hours Ticket Type: CHILD, STUDENT & DISABLE TICKET Price: RM24.00 Validity: 24 Hours Price: RM43.00 Validity: 48 Hours For 5 to 12 years old Question: The text is mainly aimed at _ . Options: A: students B: tourists C: local people D: foreign families
(Answer)
B