When can passengers walk in the cabin?
A: seat belt sign is turning on.
B: the plane is passing the area of turbulence.
C: the plane is very bumpy.
D: seat belt sign is turning off.
A: seat belt sign is turning on.
B: the plane is passing the area of turbulence.
C: the plane is very bumpy.
D: seat belt sign is turning off.
举一反三
- Fasten the seat belt while the Fasten Seat Belt Sign is on.（ ）
- Fasten the seat belt while the Fasten Seat Belt Sign is on.
- Fasten the seat belt while the Fasten Seat Belt Sign is on.
- Fasten the seat belt while the Fasten Seat Belt Sign is on.
- When to fasten the seat belt? A: for take-off B: for landing C: during air turbulence D: whenever the Fasten Seat Belt sign is on