单项选择题

Questions 19 to 22 are based on the passage you have just heard.
When does the feeling of forward motion stop

A．When the plane stops climbing.
B．When the plane lands.
C．When there is no longer a change in speed.
D．When we begin to feel speed.

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单项选择题

单项选择题

Questions 19 to 22 are based on the passage you have just heard. When does the feeling of forward motion stop 您的浏览器不支持 audio 元素。