如果跌倒了,不能起来,继续朝着人流方向移动。如果不行,用胳臂捂住头部。
If you fall and cannot get up, keep on ____ in the same direction of the crowd. If that is not ____, then cover your head with your arms.
答案
moving,possible

移动move,根据keep on doing sth继续做某事,变成动名词形式,not possible不可能的,因此正确答案为moving, possible。

略
