问题描述: Koalos sleep __the day,but ___night they get up and eats leaves. 1个回答 分类:英语 2014-12-09 问题解答: 我来补答 Koalas sleep( during) the day,but (at ) night they get up and eats leaves. 再问: 为什么 再答: during the day 在白天 at night在晚上 两个都是固定的表示时间的短语 展开全文阅读