You may _____ your seat belt when the seat belt sign is switched off.
A: release
B: return
C: fasten
D: adjust
A: release
B: return
C: fasten
D: adjust
举一反三
- 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
- 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
- Fasten the seat belt while the Fasten Seat Belt Sign is on. A: 正确 B: 错误
- When to fasten the seat belt?