2. 外语
  3. The message of【C1】______such as this is【C2】______natural systems are complex, unpredictable: understanding them【C3】______patien

The message of【C1】______such as this is【C2】______natural systems are complex, unpredictable: understanding them【C3】______patien

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问题     The message  of【C1】______such as this is【C2】______natural systems are complex, unpredictable: understanding them【C3】______patient observation and【C4】______analysis. The lack of these conditions explains why, in the early modem era, grass snakes were killed as venomous, and gardeners【C5】______worms because they【C6】______gnaw plant roots.
   The assumption that people "ought" to know about such things is based on an urban-rural divide that opened up in the 18th century. For a【C7】______of centuries, city and country people did【C8】______separate realms. But the ear, the phone, the media and the Internet have contributed to the【C9】______tendency of what we call modem lifestyle; and the vast population.【C10】______from cities into rural areas blurred the difference【C11】______urban and rural. Thus, a new word "rurban" —has been coined to【C12】______this condition. Most of us now work【C13】______or in an office, and【C14】______we are involved in our primary industries, we are【C15】______more likely to be staring【C16】______a computer than【C17】______with the landscape. Human life has turned generally into a【C18】______by work, sleep, shopping and TV-all【C19】______identical【C20】______performed in town or country.
【C20】
选项 A、whether
B、if
C、weather
D、even
答案A
解析 whether...or 表选择。因此选择A。
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