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Ngọc Anh Nguyễn Passage 1: Question 1: If we continue (1) fossil fuels the way we do now, we will soon run out of them. A. use B. to use C. using D. used Answer: C. using Explanation: "Continue" is followed by the -ing form of a verb (gerund), so the correct choice is "using." --- Question 2: We can use renewable energy from sources such as wind, rain, waves, and sunlight, which can be replaced (2) In addition, such energy has a low environmental impact. A. naturally B. carefully C. normally D. finally Answer: A. naturally Explanation: The most suitable word to complete the sentence is "naturally" because renewable energy is naturally replenished. --- Question 3: In recent years, however, it (3) easier to produce thanks to technological advances. A. become B. became C. has become D. will become Answer: C. has become Explanation: "Has become" indicates a change that happened recently and continues to the present. --- Question 4: Wind energy is one of the (4) cheaper and most sustainable types of energy. A. dirtiest B. most serious C. smallest D. cleanest Answer: D. cleanest Explanation: Wind energy is clean, so "cleanest" is the most appropriate adjective here. --- Passage 2: Question 9: Generation gap refers to the difference in the ways of thinking and perception in the people of two different generations which results in behavioral differences, and sometimes, (9) between them. A. opposition B. conflicts C. wars D. sympathy Answer: B. conflicts Explanation: "Conflicts" is the most fitting word as it describes the behavioral differences resulting from a generation gap. --- Question 10: It is the difference in the thinking of the people of older and younger generations that creates the (10) of understanding between them. A. miss B. shortage C. failure D. lack Answer: D. lack Explanation: "Lack of understanding" is a common expression to describe the absence of understanding between people. --- Question 11: The most common example of generation gap is seen in the family between parents and their children. It is not only because of the gap in age but also because of the way parents (11) to a particular situation. A. react B. behave C. change D. experience Answer: A. react Explanation: Parents' reactions to a situation often differ from how their children react, creating a generation gap. --- Question 12: The Internet provides solutions to most of the problems that children needn't ask their own parents for help, (12) gap, the communication and leading to a generation. A. reduce B. to reduce C. being reduced D. reducing Answer: D. reducing Explanation: "Reducing" fits grammatically, indicating the reduction in communication due to the Internet. --- Passage 3: Question: Carbon footprint is one of the main contributors to global warming. As mentioned in the media, members of the public are widely advised to reduce their carbon footprint and the specific steps to cut it down can be followed easily. First, carbon dioxide is largely emitted from the burning of fossil fuels in transportation, so people can shift away from petrol used cars to eco-friendly vehicles running on electricity or clean ethanol. Driving less is another way to lessen a significant amount of exhaust fumes. It's encouraged to ride electric bikes to work for short distances and take a train or a bus for long journeys. Second, lowering energy waste at home can make a big difference. Considering household appliances like lights or TVs, when they are not in use, homeowners should switch off them and better to remove their plugs from the sockets to save more energy. According to a report, homeowners can save between $100 and $200 each year by doing so. In addition, it's wasteful to set your fridge and freezer temperatures lower than necessary, staying between 35° and 38°F to keep fresh food and 0 degrees for freezers. Last but not least, about 268 million tons of trash a year is produced by the U.S. Reducing energy consumption by recycling, therefore, can help reduce (continue reading)