Question: Article: A new study says that birds living in big cities sing shorter, faster songs that are higher-pitched than those sung by their brothers in the forests. The researchers think that the birds adjust their songs to allow themselves to be heard over the noises of the city, especially the low traffic noise. To study how urban birds song, Hans Slabbekoorn and Ardie den Bore, biologists at the University of Leiden in Netherlands, travelled around Europe and recorded bird songs in ten major cities and in nearby forests. The species they focused on, the great tit , is widespread across Eurasia and one of the few types of birds that _ in big cities. Singing is crucial for males, which use their songs to attract mates and mark out their territory. The changing songs could play a role in eventually causing the city birds and the forest dwellers to evolve into separate species. The findings could also help explain why usually only a few bird species thrive in cities. By contrast, many more bird species tend to be found in forests and other undeveloped habitats. Studies like this could eventually help researchers predict how urbanization will affect birds, using this knowledge could help urban planners design more pleasant city environments, study co-author Slabbe-koorn said. "You can make a city much more livable if you pay attention to where the noise goes and where the people go," he said. "It would be easy to fit the birds into those models." Then cities wouldn't be strictly for the people, but also for the birds. Question: What is NOT the effect that studies of birds' songs have? Yes or no, is the answer "Driving the urban birds back to the forest."?
Answer: No

Question: Article: Many private institutions of higher education around the country are in danger. Not all will be saved, and perhaps not all deserve to be saved. There are low-quality schools just as there are low-quality businesses. We have no duty to save them simply because they exist. But many promising institutions that deserve to continue are threatened. They are doing a fine job educationally, but they are caught in a financial squeeze, with no way to reduce rising cost or increase income significantly. Raising tuition doesn't bring in more income, for each time tuition goes up, the enrollment goes down, or the amount that must be given away in student aid goes up. Schools are bad businesses, whether public or private, not usually because of mismanagement but because of the nature of the enterprise. They lose money on every customer, and they can go bankrupt either from too few students or too many students. Even a very good college is a very bad business. It is such colleges, promising but threatened, that I worry about. Low enrollment is not their chief problem. Even with full enrollment, they may _ . Efforts to save them, and preferably to keep them private, are a national necessity. There is no basis for arguing that private schools are inherently better than public schools. There are many examples to the contrary. Anyone can name state universities and colleges that rank as the finest in the nation and the world. It is now inevitable that public institutions will be dominant, and therefore diversity is a national necessity. Diversity in the way we support schools tends to give us a healthy diversity in the forms of education. In an imperfect society such as ours, uniformity of education throughout the nation could be dangerous, In an imperfect society, diversity is a positive good. Supporters of public higher education know the importance of sustaining private higher education. Question: According to the author's opinion schools are bad businesses because of _ . Yes or no, is the answer "the nature of schools"?
Answer: Yes

Question: Article: I arrived late one night on a business trip, so I decided to have dinner in the hotel I stayed in. As I was finishing my meal, an elderly couple came in. They were holding hands and had lovely smiles on their faces. They sat three tables from me. I was amazed at the love they showed for each other. It stuck me because it was shortly after ending a 20-year marriage and I still had pain in my heart. My waiter was also their waiter. As I paid my bill, I asked what their bill was. He told me, and I gave him $40 to pay their bill. He asked if I knew them and I told him "No, I just wanted to repay them for the love that they were showing to each other," and then I left. The next day I entered the restaurant again. After I had been seated, the waiter who served me the night before told me that the strangest thing happened after I left the restaurant. When the elderly couple went to pay for their meal, they were told that it had been paid. The waiter just told them what I said. They were amazed. They looked around, asked for the bill of two young couples who were seated together, paid their bill and left. I smiled and ordered my meal. About 45 minutes later, I finished my meal and was about to head out, but my waiter was nowhere to be found. I explained to the hostess that I needed to pay for my meal and hurry to the airport. She smiled and explained that I would not have to pay, because she felt she should pay for my bill because of the joy brought to the faces of the elderly couple and the amazement of the young couples. When I told her that they didn't have to do that, she said with a smile "Love creates Love." Question: The writer's purpose of writing the passage is to _ . Yes or no, is the answer "prove a show of love really makes a difference"?
Answer:
No