2. 外语
  3. A. Where you stand while waiting to cross a road B. Where you walk C. Where you sit on a bus and how you travel D. When you go t

A. Where you stand while waiting to cross a road B. Where you walk C. Where you sit on a bus and how you travel D. When you go t

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问题 A. Where you stand while waiting to cross a road
B. Where you walk
C. Where you sit on a bus and how you travel
D. When you go to bed
E. When pollution levels rise and fall
F. When you get up

*
选项
答案B
解析 答案可在最后一段里找到。作者说了，晚间污染程度低于白天，春秋季污染程度低于夏冬。所以本题应填入的是in spring and autumn。
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