2. 外语
  3. Rainforests are called the lungs of the planet, because they absorb carbon dioxide, greenhouse gas, and produce oxygen, which is

Rainforests are called the lungs of the planet, because they absorb carbon dioxide, greenhouse gas, and produce oxygen, which is

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问题     Rainforests are called the lungs of the planet, because they absorb carbon dioxide, greenhouse gas, and produce oxygen, which is【C1】______important to our well-being.【C2】______the fact that rainforests cover only 12 percent of the land-area of the Earth, they are home to【C3】______of the world’s plant and animal species, and for local populations they are a【C4】______source for food, fiber, fuel and medicines. Tropical forests【C5】______global and regional climate-systems, and【C6】______moisture into the atmosphere, which then returns to earth in the form of rain.
    【C7】______, where the land has been logged, there are no longer trees to produce the rain cycle which cools down the atmosphere, or to reduce carbon dioxide levels,【C8】______ to climate change. Because of tropical deforestation, animal and plant【C9】______is disappearing, and at least one species becomes【C10】______every day.
    Now that people are no longer【C11】______of the destructive lumbering of forest, the United States has partnered with the private sector, other governments and civil society organizations to form the Tropical Forest Alliance 2020(TFA 2020). The alliance aims to【C12】______ and coordinate actions by all partners to reduce tropical deforestation【C13】______ to key agricultural commodities such as palm oil, soy, beef, and paper. In support of TFA 2020, USAID【C14】______in early July that it will contribute $5.5 million to a separate but related public-private partnership with the World Resources Institute. With the help of this new tool, TFA 2020 partners will be able to more easily monitor tropical deforestation, and then quickly【C15】______ the information.
    The United States has consistently worked to【C16】______ the conservation of tropical forests by advancing【C17】______ and cooperative approaches, developing【C18】______ technical expertise and services, and【C19】______ leadership. With the new multi-national, public-private TFA 2020 partnership, we look forward to further increasing the【C20】______of our engagement.
【C1】
选项 A、critically
B、barely
C、slightly
D、mainly
答案A
解析 副词辨析题。句意为：热带雨林被称为“地球之肺”，因为它们能吸收二氧化碳、温室气体，并产生氧气，这对我们的健康至关重要。critically“紧要地，关键性地”；barely“仅仅，勉强，几乎不”；slightly“轻微地”；mainly“主要地，大体上”。由于热带雨林具有调节气候的重要功能，所以对人类健康极其重要，因此[A]critically为答案。
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