We very early so we packed the night before.
A. leave
B. had left
C. were leaving
D. have left
网友回答
A. leave
B. had left
(答案→)C. were leaving
D. have left
解析：考查时态。句意“我们（第二天）很早就要出发了，因此我们前天晚上就收拾好了行李。”根据句意可知，表示的是过去的动作，排除A、D；leave发生在pack之后，不可能用过去完成时，排除B；go, e, leave等表示位置移动的词可以用进行时表将来；故选C。