2. 职称英语
  3. Doctors still know little about how the Listeria bacterium is spread and why the

Doctors still know little about how the Listeria bacterium is spread and why the

游客2025-02-25  35
问题 Doctors still know little about how the Listeria bacterium is spread and why the disease it causes, listeriosis, afflicts some people in a contaminated area though it spares many others.
选项 A、though it spares
B、where it spares
C、despite sparing
D、when sparing
E、while sparing
答案 E
解析 在why引导的宾语从句中，根据afflicts some people和spares many others在意思上的对比关系，可以断定B、D无法表达出这种对比关系。对于C，根据GMAT公理，despite之后不跟动名词短语，只跟简单的名词短语，因而C错，同时让步语气不符合句意。A、B有一共同错误：it指代问题。因为在划线部分中的it之前，还出现过一个it，从语法上讲，这两者应指代同一对象，即都应指代the bacterium。但从句意上讲，后一个it应指the disease或listeriosis，二者产生矛盾。E最佳，while sparing的逻辑主语就是disease，同时又表明对比关系。
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