Surveys show that the majority of passengers are p

问题补充：

Surveys show that the majority of passengers are pleased that an agreement has been reached to forbid smoking on

答案：

B commercial flight调查显示对于美国境内商务航班禁止吸烟的协议达成,大部分乘客都很高兴.A若理解为想表示经济航班应为economy class eonomical flight说法不成立C 中global flight跟后面winthin the continental U...

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