All passengers _______, please fasten your seat belts and remain seated _______ the plane is landing.
#22186
A
on board; until
B
abroad; since
C
on the board; before
D
aboard; when
推荐题目
Noise is unpleasant, _____ when you are trying to sleep. 
#24104
A
especially
B
specially
C
extremely
D
naturally
—I heard Charlotte had been drowned in the lake.—Really!Her boat turned______,and ______she couldn’t swim.
#24920
A
down;fortunately
B
up;unfortunate
C
over;unfortunately
D
down;unfortunately
As he lived          on the         island, he felt         .    
#23702
A
alone; alone; lonely
B
alone; lonely; lonely
C
lonely; alone; alone
D
lonely; lonely; alone