[audioFiles]audio_eusm_0110(20106)[/audioFiles]A、To commemorate a historic flig

游客2024-06-06  9

问题  

选项 A、To commemorate a historic flight,
B、To try out eight new balloons.
C、To recruit balloonists from all over the United States.
D、To test whether helium (氦气) balloons are better than hot-air balloons.

答案 A

解析
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