Passengers are permitted only one piece of hand luggage onto the plane.
A. to carry
B. carrying
C. to be carried
D. being carried
网友回答
(答案→)A. to carry
B. carrying
C. to be carried
D. being carried
解析：考查动词搭配：permit sb to do sth允许某人做…，被动是：sb be permitted to do，句意：乘客只被允许带一件手提行李上飞机。选A。