Choose the best answer.

Emma and Trung are discussing the activities for their group project.

Emma: “Well, what we need to do is to start a 3Rs campaign?”

Trung: “______ 3Rs?”

Emma: “Ah, it’s Reduce - Reuse - Recycle.”

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Dams and reservoirs are required ______ to store water during periods of surplus water availability.

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Ann and Mai are discussing the benefits of part-time jobs for students.

Ann: “Well, I think the first benefit is that students can earn money to pay their tuition fees. What do you think, Mai?”

Mai: “_______, Ann. Now there are many kinds of part-time jobs that help students become more independent and improve some necessary skills for their future job.”

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Deforestation happens when trees are cut down to make room for farming, construction or ______.

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In the United States, fossil fuels were the main source to ______ about 60% of total electricity generation in 2020.

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Climate scientists are discussing the ______ of the Amazon rainforest deforestation.

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Energy plays a key role for ______ development of a country.

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The use of biofuels helps to achieve energy ______ as it helps reduce the dependence on foreign oil for some countries.