2. 外语
  3. Cotton production has been ________ the decline these years.

Cotton production has been ________ the decline these years.

admin2011-02-04  68
问题 Cotton production has been ________ the decline these years.
选项 A、down
B、on
C、at
D、under
答案B
解析 介词的固定搭配。on the decline为固定搭配，意为“在减少，在衰退”，如：The population of that country is on the decline．(那个国家的人口在减少)故只能选B。句意为：这些年来，棉花的产量在减少。
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大学英语六级

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