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

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

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问题                               Text
   …
   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 modern 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 car, the phone, the media and the Internet have contributed to the【C9】______tendency of what we call modern 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.  
【C6】
选项 A、were thought to
B、thought to
C、were thought
D、thought
答案A
解析 本题考查被动语态用法。句中“they”代指“the worms”，故应用被动语态。后有动词gnaw，需用不定式to连接，故选A。
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