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XV. Read the following passage and mark the letter A, B, C or D to indicate the correct word that best fits each of the numbered blanks.

One effective way to go (1) ______ and contribute (2) ______ a more sustainable future is by adopting energy-efficient practices in our homes. By making simple changes to our daily routines and household habits, we can (3) ______ reduce our energy consumption and carbon footprint. First and foremost, we can invest in energy-efficient (4) ______ such as refrigerators, air conditioners, and light bulbs, (5) ______ will consume less energy while having the same performance. Additionally, reducing the need for excessive heating or cooling in our homes can (6) ______ maintain ideal temperature levels. Another way to save energy is by using natural light whenever possible and turning (7) ______ lights and electronic devices when not in use. Moreover, using renewable energy sources, such as solar panels or wind turbines, (8) ______ provide clean and sustainable energy for our homes. By using these energy-saving strategies, we can make a significant positive impact (9) ______ the environment and work towards (10) ______ greener and more sustainable future.

1. A. yellow B. blue C. green D. blue
2. A. in B. to C. from D. at
3. A. significant B. significantly C. signify D. significance
4. A. appliances B. applications C. applies D. apply
5. A. when B. who C. that D. which
6. A. help B. cause C. prevent D. kill
7. A. on B. in C. at D. through
8. A. mustn’t B. may C. could D. can
9. A. an B. the C. a D. our
10. A. an B. the C. a D. our

XVI. Read the following passage and choose the correct answer to each of the questions.