When to fasten the seat belt?
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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
参考答案:
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
参考答案: