our duty is ___(save ) water

our duty is ___(save ) water Who is ___ duty today? working hard is our duty .是duty 还是duties呢 it is our duty to do Animals are our firengs,so___(protect) them is our duty It's our duty to save all the people's lives here.如何翻译? 关于如何保护我们的水源以it's our duty to save water 为题 .___ is our duty for us young adults to work hard at our lessons.A.That B.It C.This D.He To save water is (to) save our livesTo save water is ( ) our lives.A.to save B.save 选什么?为什么?请说清理由!is 怎么会跟 to do save our SAVE our It's on duty to keep our classroom clean 改为同义句_______ ________ our classroom clean is our duty. it is our duty to distribute to the society翻译 it is our duty to protect the environment. It is our duty to protect the environment Protecting the environment is our duty.汉语意思? to protect the environment is our duty 同义句 It is our duty to ＿（study） hard.