考研考试

【单选题】As we enter the 21st century, a new global economy draws nations ever closer.But our growing interdependence (1) on much more than technology and trade. For we are linked intrinsically (本质地) by the physical and biological webs that (2) life on our planet—and, increasingly, by the threat of their unraveling (散开). Indeed, (3) we reach across borders and face this threat together, the next century may (4) anEarth in ecological crisis, with half of all (5) gone, and our grandchildren enduring deadly floods, drought and disease (6) by global warming.
When millions acrossAmerica (7) the firstEarthDay 30 years ago, our focus understandably was our own backyarD、Our rivers were (8) on fire, and our skylines were disappearing behind a (9) of smog.America’s remarkable environmental progress in the years (10) is powerful testament (证明) to our national will, our technological prowess (超凡技术) and our (11) in a better future. Protecting the environment is today a bedrock (基本的)American value, (12) important to us as safe neighborhoods and good schools. What’s more, three decades of experience have (13) the naysayers (反对的人) wrong. Tending to the environment has not (14) our economy. (15) , our air and water are the cleanest they have been in a generation, even as we enjoy the longest economic (16) in our nations’ history.
America’s responsibility now, as we mark the firstEarthDay of a new millennium (一千年), is to bring these lessons to bear against new, more (17) environmental challenges. We must look well (18) our own cities and countryside, make environment a core foreign policy (19) and provide the leadership needed to put all nations on a cleaner, more sustainable path to (20) .

A、retain

B、contain
C．revive
D．sustain

网考网参考答案：D
网考网解析：
“使人类联系在一起的自然生物网可以______地球上的生命”，符合逻辑的选项为sustain“支持；供养；继续”，如：sustain a family“养家”，其他不合文意。[A]retain“保存；保留”，如：retain a sense of dignity“保持尊严感”；[B]contain“包含；容纳”；[C]revive“恢复；使复苏”，如：revive sb. with artificial respiration“用人工呼吸使某人苏醒”。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>