英语翻译it can be very useful ___ ____the meaning of "etiquette"

英语翻译it can be very useful ___ ____the meaning of "etiquette" It can be very useful to understand.Etiquette is very import 英语翻译fire can be very useful,but it can also be very harmful Fire can be very useful but it can be very useful to understand中to understand是什么成分? The Intemet is very useful.We can get a lot of ____ from it. Internet is very useful.We can get a lot of i_____ form it. 英语翻译We can __ ____ of ___ ____the food every day 改错:All of the first,It can be useful in studying,entertainme 初三英语连词成句,单词有：it is,ads,that,some,very,can,true,be,useful 陈述句 the internet is very useful.we can use it( )english 牛津英语7b第一课的,关于火的,课文挺长的,翻译,fire can be very useful,but it can