The koalas sleep during day,and get up to leaves at night.

问题描述:

The koalas sleep during day,and get up to leaves at night.
空格中要填什么?原因是什么?
请老师讲解!
对不起啊
空格在during后面 day前面
我知道是不定冠词the,但原因是什么

亲:冠词的知识很复杂.有用the的,也有不用的.要强化记忆.
例如:at night/noon/midnight
during the day/in the day