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After reading this passage from a health textbook, answer the question that follows it.(1)    Things had been looking up for the Great Lakes. The pollution-fouled waters of Lake Erie and the other Great Lakes shared by Canada and the United States had become gradually cleaner in the years following the Clean Water Act of 1970 and a binational agreement in 1972. As government regulation brought industrial discharges under control, people once again began to use the lakes for recreation, and populations of fish rebounded.(2)    Then the zebra mussel arrived. Black-and-white-striped shellfish the size of a dime, zebra mussels attach to hard surfaces and feed on algae by filtering water through their gills. This mollusk is native to the Caspian Sea, Black Sea, and Azov Sea in western Asia and eastern Europe. In 1988, it was discovered in North American waters at Lake St. Clair, which connects Lake Erie with Lake Huron. It was brought to this continent by accident when ships arriving from Europe discharged ballast water containing the mussels or their larvae into the Great Lakes.(3)    Within just two years of their discovery in Lake St. Clair, zebra mussels had multiplied and reached all five of the Great Lakes. The next year, these invaders entered New York’s Hudson River to the east, and the Illinois River at Chicago to the west. From the Illinois River and its canals, they soon reached the Mississippi river, giving them access to a vast watershed covering 40% of the United States. In just three more years, they spread to 19 U.S. states and two Canadian provinces. By 2010, they had colonized waters in 30 U.S. states.(4)    Why all the fuss? Zebra mussels clog up water intake pipes at factories, power plants, municipal water supplies, and wastewater treatment facilities. At one Michigan power plant, workers counted 700,000 mussels per square meter of pipe surface. Great densities of these organisms can damage boat engines, degrade docks, foul fishing gear, and sink buoys that ships use for navigation. Through such impacts, zebra mussels cost Great Lakes economies an estimated $5 billion in the first decade of the invasion, and they continue to impose costs of hundreds of millions of dollars each year.—Withgott et al., Environment: The Science behind the Stories, pp. 77–78The authors support their thesis with all of the following types of evidence except

Choose the best way to fix the bolded part of the sentence.While John was waiting for Amy to arrive he finished reading the newspaper. 

After reading this passage from a government textbook, answer the question that follows it. (1)    Public opinion polling is a relatively new science. It was first developed by a young man named George Gallup, who initially did some polling for his mother-in-law, a long-shot candidate for secretary of state in Iowa in 1932. With the Democratic landslide of that year, she won a stunning victory, thereby further stimulating Gallupʼs interest in politics. From that little acorn the mighty oak of public opinion polling has grown. The firm that Gallup founded spread throughout the democratic world, and in some languages Gallup is actually the word used for an opinion poll.(2)    It would be prohibitively expensive and time-consuming to ask every citizen his or her opinion on a whole range of issues. Instead, polls rely on a sample of the population—a relatively small proportion of people who are chosen to represent the whole. Herbert Asher draws an analogy to a blood test to illustrate the principle of sampling. Your doctor does not need to drain a gallon of blood from you to determine whether you have a disease. Rather, a small sample of blood will reveal its properties.(3)    In public opinion polling, a sample of about 1,000 to 1,500 people can accurately represent the “universe” of potential voters. The key to the accuracy of opinion polls is the technique of random sampling, which operates on the principle that everyone should have an equal probability of being selected as part of the sample. Your chance of being asked to be in the poll should therefore be as good as that of anyone else—rich or poor, black or white, young or old, male or female. If the sample is randomly drawn, about 13 percent of those interviewed will be African American, slightly over 50 percent female, and so forth, matching the population as a whole.(4)    Computer and telephone technology has made surveying less expensive and more commonplace. In the early days of polling, pollsters needed a national network of interviewers to traipse door-to-door in their localities with a clipboard of questions. Now most polling is done on the telephone.—Edwards et al., Government in America: People, Politics, and Policy, pp. 176–177The main idea of paragraph 2 is that

Choose the best way to fix the bolded part of the sentence. The kitchen in the apartment needs many repairs which is costly. 

Draw the Lewis structure for H2O and determine the following. You are welcome to draw it on paper and upload as work within 5 min after you submit the test. Molecular Geometry Polar or non-polar Intermolecular forces

Draw the Lewis structure for CS2 and determine the following. You are welcome to draw it on paper and upload as work within 5 min after you submit the test. Molecular Geometry Polar or non-polar Intermolecular forces

Match each picture with its Spanish name. [ensalada] [carne] [cuenta]  

What would be the most appropriate response if this man asked you, “¿Cómo me queda esta camisa?”

Complete the conversation by filling in the blanks.   Alberto: Buenas tardes, ¿cómo está? Magdalena: Bien, gracias. ¿Cómo se llama usted? Alberto: [Mellamo] Alberto. Mucho gusto. Magdalena: Mucho gusto. Me llamo Magdalena. Alberto: ¿De dónde es usted? Magdalena: [Soyde] Argentina. 

Fill in the blanks to ask your friend how long they have been singing. Use proper accents where needed. ¿Hace [cuanto] que tú [cantas]?