2. 外语
  3. A key factor in Beijing’s winning ______was a promise to improve the city’ s poor air quality.

A key factor in Beijing’s winning ______was a promise to improve the city’ s poor air quality.

admin2011-04-26  30
问题 A key factor in Beijing’s winning ______was a promise to improve the city’ s poor air quality.
选项 A、host
B、battle
C、bid
D、chair
答案C
解析
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