It's on duty to keep our classroom clean 改为同义句_______ ________ our classroom clean is our duty.

It's on duty to keep our classroom clean 改为同义句_______ ________ our classroom clean is our duty. it s everyone s duty to keep the e healthy.在e后面填空 Waste paper should be throun every were,It's our duty to keep our city clean I think it's our duty to keep our environment clean and tidy. Don't t_____ here and there.It's our duty to keep our school clean It's our duty to keep the balance of （n ）以n开头的词 I think __our duty to keep our evirionment clean an tidy.A.this B.that C .it D.it's It is our duty to keep the classroom c--------. Don't throw waste paper everywhere.It's our duty to keep our school_____ A.clean B.cleaing it is everyone's duty to___-our school a pleasant place to learn infind set keep make it's your turn to be on duty 不定式在句中做什么成分 duty report 什么意思?解释下：it's one's duty to do sth.have an influence on sth.be lost lose one's heart Our classroom?every dayA.cleans B .is cleaning C.Is cleanedSo it is.It's our duty to keep it clean and tidy It is our duty to keep our schoolyard clean and tidy.这句话是主语从句吗?It's one's duty是固定搭配吗?如何翻译,用法是什么? it's one's duty to do sth.翻译 l'm at school and it's my turn to be on duty today的意思是什么 英语帝速来啊!they thought it their duty to keep the secret.they thought it is their duty to keep the secret.哪一句是正确的, Waste paper shouldn't ____ enerywhere.It's our duty to keep our city clean.A.be thrown B.thronw C.is thrown D.are thrown