帮我用简单英语解释下列句子

帮我用简单英语解释下列句子
1.The water was [pouring] into the river.
2.The information he gave us is [of great value].
3.His brother is an excellent teacher.
4.[In a few words],I think we should accept his offer.
5.Children under five usually travel free on trains.
6.I was so [pleased] when they said they'd be able to stay for another week.
7.How many students are [absent] today?
8.We ought to elect a new sports editor.
要求:对[]内的部分做重点解释,写出的句子必须是原句全句的解释,必须是完整的句子.(急~)