The bus driver stopped the bus without thinking twice. He got off and asked the woman what happened. She said that the man had a heart problem and should go to the hospital. The driver knew he had to act . He told the passengers that he must take the man to the hospital.
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.