All passengers ____, please fasten your
题型:选择题
问题:
All passengers ____, please fasten your seat belts and remain seated ____the plane is landing.
A.on board; until
B.abroad; since
C.on the board; before
D.aboard; when
All passengers ____, please fasten your seat belts and remain seated ____the plane is landing.
A.on board; until
B.abroad; since
C.on the board; before
D.aboard; when