Our responsibility involves (dealing with) the problems of homelessness in the city.请教下这个为什么用dealing现在分词

I think __it____ our responsibility to do something for the 2008 Olympic Games.为什么要填it?it指代什么? responsibility responsibility Responsibility?What do I speak such as? She made no ______ to what I said.(responsibility) i love you is the responsibility of alifetime是什么意思 i hope ican should my responsibility abd live a happy please note that this information is furnished without any responsibility on our part.该如何翻译 英语翻译而是 our responsibility is doing （或to do) responsible for the people I can kill you?I wasdeath,my responsibility is to theKill you responsibility是什么意思 responsibility是什么意思 contributory responsibility responsibility是什么意思 我们的责任是对人民负责.”英文翻译为什么不是“our responsibility is responsible for the people.而是 our responsibility is doing （或to do) responsible for the people 英语翻译our entire generation's responsibility is agitation,which has the luxury to be able to make a difference. Our responsibility involves (dealing with) the problems of homelessness in the city.请教下这个为什么用dealing现在分词 谁能帮我写一份关于大学生英语三分钟的演讲稿啊,the responsibility of our college students