249. You used to think that being green was a luxury for your company, but climate change has made you realize that you can no longer ignore it. The buzz is about becoming carbon-neutral, but where do you start? Consider your drivers. Do you want to become carbon-neutral for marketing reasons, for financial reasons or to help save the planet? (59 words)

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WPM 168

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250. In multi-lingual countries, code-mixing, the use of more than one variety in the same utterance or sentence and code-switching, the use of different languages or varieties between sentences is common and natural. Despite its frequency, or perhaps because of it, some scholars and self-appointed guardians of linguistic morality, view both code-mixing and code-switching as a sign of linguistic deficiency. (59 words)

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WPM 147

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251. The maximum yield of plants, determined by their genetic potential, is seldom achieved because factors such as insufficient water or nutrients, adverse climate conditions, plant diseases, and insect damage will limit growth at some stage. Plants subjected to these biotic and abiotic constraints are said to be stressed. (48 words)

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WPM 137

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252. Australian speak English of course. But for many tourists and even some locals, Australian English has only tenuous links with mother tone. Our speech is prepared with words and phrases whose arcane meanings are understood only by the initiate. It is these colorful colloquialisms that Australian slang set to truly explain. (51 words)

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WPM 161

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253. Teenage girls are continuing to outperform boys in English while the gender gap in achievements in math and science has almost disappeared. The figures show that last year 80% of 14-year-old girls reached at least the expected level 5 in English, compared with 65% of boys. But in math, the girls are just 1% ahead of boys, while in science the difference is 2%. (64 words)

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WPM 147

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254. Have you ever pictured a world without light? Just think how much we rely on man-made light sources in our lives. Without engineers, we wouldn't be able to live the way we do. No street lights, no TV, no computer display, no house lights. Engineers design and build all these things, and they also design, build and run the electricity systems that power all these light sources. (67 words)

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WPM 182

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255. There is no single method of learning that guarantees success. How we learn that depends on many different factors. And what works best for you will not necessarily be the same as the approach used for the other students even they study the same course. We are all unique as learners, although some patterns emerge from any groups of students. (60 words)

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WPM 180

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256. Certainly one of the important values of literature is that it nourishes our emotional lives. An effective literary work may seem to speak directly to us especially if we are ripe for it. The inner life that good writers reveal in their characters often gives us glimpses of some portion of ourselves. We can be moved to laugh, cry, tremble, dream, ponder, shriek, or rage with a character by simply turning the page instead of turning our lives upside down. (80 words)

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WPM 192

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257. Imagine living all your life as the only family on your street. Then, one morning, you open the front door and discover houses all around you. You see neighbors tending their gardens and children walking to school. Where did all the people come from? What if the answer turned out to be that they had always been there — you just hadn't seen them? (63 words)

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WPM 180

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257. Internal combustion engine enables the driver to decide which source of power is appropriate for the travel requirements of a given journey. Major US auto manufacturers are now developing feasible hybrid electric vehicles, and some are exploring fuel-cell technology for their electric cars.(43 words)

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WPM 143

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258. The Japanese tea ceremony is a ritual tour influenced by Buddhism in which green tea is prepared and served to a small group of guests in a peaceful setting. The ceremony can take as long as four hours and there are many traditional gestures that both the server and the guest must perform. (53 words)

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