Electricity is important ______ us.填to 还是for?有什么区别?sth is adj _____ sb,这样的结构中,介词到底应该是to 还是for?

Electricity is like water,partly. Electricity 把Everyone knows that exercise is impor-tant改为否定句 electricity is like water, partly同义句 Gas is chaper than electricity(保持句意不变）Electricity is ___ ____than gas Gas is cheaper than electricity.句型改变改变句型Gas is cheaper than electricity.（保持句意不变）Electricity ____ _____ than gas. what is electricity?can you tell me同义句改写 what is the beginning of electricity,the end of time? Electricity is like water,partly.改为同义句 Electricity has always been around a__________ it is invisible. Electricity is more dangerours than water.急用.切记啊 What is the begining of electricity,the end of time? 以electricity is our good servant为题写一篇作文 electricity is very useful and we should--------(use) it properly Electricity is a form of energy得同义句 to be careful with electricity is important(用it改写)it ____ ____ ____ be careful with electricity 根据括号中的单词的适当形式完成句子 -------（know）how to ask for information politely is vevy impor最后的单词是 important Electricity is very useful in our life.（感叹句）_____ _____electricity is in our life.