We don't waste paper. We save thousands of trees. (Using conditional sentence type 1)

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III.DO AS DIRECTED :
1.We don't waste paper. We save thousands of trees. (Using conditional sentence type 1)
2.People cough a lot. They breathe in the fumes from cars. (combine, using "because")
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3.People use water carefully. People have fresh water to use. (using conditional sentence type 1)
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4.Yes. Have the rescue workers been sent to the flooded victims recently? (Make a question)
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5.The river is polluted. Households dump waste ijnto the river. (Combine, using "because")
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6.If / I/ you / I/ take / these bottles / the bottle bank. (Complete the sentence)
7.If / there / no more pollution / the world / become / better place. (Complete the sentence)
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8.Yes. Has the victim found a shelter in a cave? (Make a question)
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9.A big storm destroyed our house last year. (Passive voice)
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10.My family visited the Eiffel Tower in Paris two years ago. (Make a question)
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11.Rescue teams saved hundreds of people from floods in Manila yesterday. (passive voice)