to在这句的用法It's important to save energy and to reduce waste ga

to在这句的用法It's important to save energy and to reduce waste ga They are working ______(energy)to reduce waste. how to save energy It's my duty to save patients.的同义句 It's very important to save endangered animals . 这句话有错误吗? It's bad to waste water.(改为同义句) We ought to save energy .改为同义句 同义句转换 It's important to keep healthy.It's important to ____ 同义句转换 It's important to stay healthy.It's important to keep It‘s important to be happy.(改为同义句) It‘s important to be__ __ It's important to 和 It'important for 的区别 《how to save energy in our daily life》的作文