.___ is our duty for us young adults to work hard at our lessons.A.That B.It C.This D.He

our duty is ___(save ) water .___ is our duty for us young adults to work hard at our lessons.A.That B.It C.This D.He 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 Jack piays for our football team .(改为否定句） Jack is ___ ___ ___ our school football team . 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. It is our duty to keep the classroom c--------. It is our duty out environment?问好填什么 Protecting the wildlife is our duty改同义句________our duty _____ _________the wildlife It.is.our.duty.to.try.our.best.to.dealIt.is.our.duty.to.try.our.best.to.deal.with.the.challenges.with.the.help.of.our.teachers.