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Choose the letter A, B, C or D to complete the passage belowWater pollution happens __________ (1) toxic substances enter water bodies such as lakes, rivers, oceans and so on, getting dissolved in them, lying suspended in the water or depositing on the bed. This degrades the quality of water. Not __________ (2) does this spell disaster for aquatic ecosystems, the pollutants also seep through and reach the groundwater, which might end up in our households as contaminated water we use in our daily activities, including drinking. Water pollution can be __________ (3) in a number of ways, one of the most polluting being city sewage and industrial waste discharge. Indirect sources __________ (4) water pollution include contaminants that enter the water supply from soils or groundwater systems and from the atmosphere via rain.Question 3:
Choose the letter A, B, C or D to complete the passage belowComputers are helpful in many ways. First, they are fast. They can work with information even (6) __________ than a person. Second, computers can work with a lot of information at the same time. Third, they can store information for a long time. They do not forget things that the common people do. (7) __________, computers are almost always correct. They are not perfect, but they usually do not make mistakes.Recently, it is important (8) __________ about computers. There are a number of things to learn. Many companies have computers at work. In addition, most universities (9) __________ day and night courses in Computer Science. Another way to learn is from a bok, or from a friend. After a few hours of practice, you can (10) __________ with computers.Question 7: