You need _____(clean) your room every day.
1.我们应该当心水火.
We must ____ ____ ____ fire and water.
2.鱼儿生活在水中,没有水它们不能存活.
Fish ___ ___ ___ .They ___ ___ without water.
3.你对足球了解多少?
____ ___ ___ you know ___ football?