Read the following article and select the best answer. Article: In most situations, light helps us see. But when it comes to looking at the night sky, light is actually a kind of pollution. It prevents our view of some of life's most striking sights: stars, planets, and even galaxies . "When I was a little boy, I loved the night sky. I remember looking up and the sky was filled with stars. I became an astronomer because I was amazed by their beauty," says Robert Gent, "Now in most big cities kids can't see the stars like I did." Normally, about 2,500 individual stars are visible to the human eyes without using any special equipment. But because of light pollution, you actually see just 200 to 300 and fewer than a dozen from some cities. Only one in three Americans can see our own galaxy with the naked eyes. Those people live far away from the lights of big cities, office buildings, and shopping malls. Fortunately, there's an inexpensive and useful way. If we shine lights down at the ground instead of up into the sky, and use lower brightness levels, we can save big amounts of energy and keep the beauty of the night sky. Many cities and towns have passed laws limiting lights at night, making sure enough shine for safety without creating much light pollution. Light pollution affects more than our view of the heavens and can harm wildlife. Migrating birds sometimes fly over cities and become confused by the brightness, flying in circles until they drop from _ Sea turtles need dark beaches for nesting and won't approach bright lights. Too much light at night may even affect human health. For all these reasons, researchers are working on ways to use lights only when and where they are truly needed. Everyone deserves to look up at the sky. Question: According to the text, using our naked eyes, _ . - people in remote areas can see more stars than those in big cities - over one third Americans can see our own galaxy - about one in three Americans in big cities can see our own galaxy - Americans can only see 200 to 300 stars
people in remote areas can see more stars than those in big cities

Read the following article and select the best answer. Article: Research led by UK and Australian scientists sheds new light on the role that our ancestors played in the extinction of Australia's prehistoric animals. The new study provides the first evidence that Tasmania's giant prehistoric animals were still living on the island when humans first arrived. The findings suggest that the mass extinction of Tasmania's large prehistoric animals was the result of human hunting, and not climate change as previously believed. Scientists have long argued over the reasons behind the worldwide mass extinction that took place towards the end of the last ice age. The main _ are generally thought to be climate change or some form of human impact. People only arrived in Tasmania around 43,000 years ago, when the island became temporarily connected by a land bridge to mainland Australia. None of Tasmania's giant animals, known as "megafauna" were known to have survived until this time. This appeared to clear humans of any involvement in the disappearance of the island's large megafauna. This new international study reports the discovery of giant kangaroos surviving in Tasmania until people arrived, placing humans back on the list of likely culprits for the extinction of the megafauna. Using the latest techniques, the team were able to determine the age of the fossilized remains of the megafauna more accurately than ever before. The results showed that some of these animals survived until at least 41,000 years agomuch later than previously thought and up to 2,000 years after the first human settlers arrived. As climate in Tasmania was not changing dramatically at this time, the researchers argue that this is evidence of these species being driven to extinction through over-hunting by humans. Question: The best title for the passage would be _ . - Giant prehistoric animals found in Tasmania - Climate change and human activities - Humans involved in prehistoric animals' extinction - Roles of climate change and human activities
Humans involved in prehistoric animals' extinction

Read the following article and select the best answer. Article: Recently, online high schools in America have sparked a debate about whether or not taxpayers' money should be used to support online education. Online schools receive the same amount of funding as all other public schools, even though they don't have to pay for rent or school equipment. States should use their educational funds to improve education at real schools, not to support online programs. Some students only use online classes to supplement their school work. They benefit from the social experience of a traditional high school, while still taking online courses. However, about 90 thousand students in America receive their education only from online schools. 50 thousand of these students take courses at Florida Virtual School, the largest online school in the country. While this method of schooling helps students who live in remote regions, most school systems are upset that they are losing more students each year to these online programs. Although online learning allows children to work at their own pace, these online schools have only one teacher per several hundred students. Often, teachers can't give struggling students the help they need as they are unable to talk face-to-face with them, to find exactly what they're having difficulty with. Additionally, even though online schooling accommodates students who live in more remote states, students in online programs may suffer in social situations because they will not learn valuable communication skills from their schooling. Similar to students who are home schooled, those who take only online classes won't learn social etiquette , and will be treated differently by their peers. Online schooling might be useful for places where there are not enough students for a real school, such as agricultural regions, but states should only spend taxpayers' money on online schools in extreme cases. Question: What is the author's attitude? - Taxpayers should not pay for online schools at all. - Taxpayers should pay more for online schools than real schools. - Taxpayers' money should be spent on online schools conditionally. - Taxpayers should support online schools in different ways.
Taxpayers' money should be spent on online schools conditionally.