1. What is the main idea of paragraph 1?
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2. What does the word “it” underlined in paragraph 1 refer to?
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3. What does the word “they” in paragraph 1 refers to? …………………………………………………………………………………………………………………………………….
4. What is the effects of the compound on children?
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5. In paragraph 2, what is the writer’s prediction about the future problem caused by chemical fertilizers?
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6. What is blue-baby syndrome and why is it dangerous?
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7. According to the passage. What will happen to the baby if a breastfeeding mother drinks contaminated water?
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8. Give 3 examples of the crustaceans
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9. What is “night soil” Is it good to use, why or why not?
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10. What is the difference between night soil and humanure?
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