15.A.loving B.observing

　　C.understanding D.praising

　　答案:C

　　解析:由上文understand提示可知,这是表示只有通过倾听和理解才能使父母与子女之间的问题得到解决。

　　三、阅读理解

　　As global temperatures rise,so do our levels of hostility(敌意) and violence,according to a new study.

　　Scientists from the University of California,Berkeley and Princeton University discovered a strong link between change in climate and human violence around the world.The study found that even minor climate deviations,such as slight changes in normal temperature and rainfall,can greatly increase the risk of conflict.

　　The link between climate variations and violent behavior was noted on a small scale—in one-on-one crimes like attack or murder—as well as on a much grander scale involving riots (暴乱) or civil war.

　　Unlike previous similar studies,this project combined data and evidence from a larger number of fields such as economics,political science,geography,psychology and archaeology,according to Professor Edward Miguel from the University of California,Berkeley.

　　Climate change that researchers explored included temperature as well as rainfall—from very low rainfall and drought conditions to extreme amounts of rainfall.

　　The scientists say their findings could have critical implications for understanding the impact of future climate change on human societies.The global temperature will increase by at least 2 Celsius over the next half century.

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