all night long people dance and sing.they do this___

问题描述:

all night long people dance and sing.they do this___
1 during the whole night 2 in all the night 3 the night long 4 in the night
选择哪一个,及分别说出每个为什么对与错

all night long==during the whole night === throughout the night -------从天黑到天亮.
2的话,去掉in.
3 应该不存在的