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SuperEnglishESL vocabulary L5U7L1
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Delimiter between question and answer:

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  • Each line maps to a question.
  • If the delimiter is used in a question, the question should be surrounded by double quotes: "My, question","My, answer"
  • The first answer in the multiple choice question must be the correct answer.






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the introduction of harmful materials or waste into the environment
pollution
a brown or gray cloud over a city caused by pollution
smog
a substance that can kill or make sick people or animals if they come in contact with it
toxic
fuels, such as gas, coal, and oil which were formed underground from plant and animal remains
fossil fuels