As the night is falling, a long queue stood at the bus stop, nervously expecting .A. to p

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A. to pick up
B. picking up
(答案→)C. to be picked up
D. being picked up
解析：考察expect的用法。Expect to do sth .此处expect的逻辑主语是a long queue 一长队的人， 与pick up 之间是被动关系，所以选择C
句意为，当夜幕降临的时候，一长队的人站在车站里，焦急地等待被车接走。