The engine of the bus was ，and the bad weather added to the worries of the passengers.
A. in vain
B. in good condition
C. out of work
D. out of order
网友回答
A. in vain
B. in good condition
C. out of work
(答案→)D. out of order
解析：短语辨析. A.徒然;无效 B. 状况良好;C. 失业 D.发生故障.根据题意,公交车发动机发生故障,恶劣的天气加重了乘客们的担心.故选D.