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  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.
【C14】
选项 A、announced
B、alleged
C、asserted
D、affirmed
答案A
解析 动词辨析题。句意为：为了支持TFA2020，美国国际开发署在7月初宣布将提供550万美元给该机构，它单独运营，但与世界资源研究机构有伙伴关系。这组动词都有“声称”的意思，区别是：announced多指首次当众正式宣布某一主张或态度，常常带有预告的意味。例如：The invention of the printing pressannounced the diffusion of knowledge．(印刷术的发明宣告了知识普及时代的来临。)allege指在无真凭实据的情况下宣称、断定。例如：The suspect alleged that he had not been in the neighborhood at the timeof the crime．(嫌疑犯声称案发时他不在现场。)assert是主观自信地宣称，或者清楚有力地坚持某个情况为事实。例如：She asserted that she was innocent．(她宣称自己是无辜的。)affirm指坚信不疑地肯定或宣称。根据上文语境，可以推断国际开发署是带有预告地宣布捐款，所以[A]announced为答案。
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