急 we have the duty to...请问这个the有必要改为a吗?we have the duty to...请问这个the有必要改为a吗?

急 we have the duty to...请问这个the有必要改为a吗?we have the duty to...请问这个the有必要改为a吗? We all have the duty to serve our country.帮忙分析一下这个句子, Life is short.we have the duty to cherish our life.everyone does.这句话对吗 have the duty of等于哪些结构 英语翻译3:we westerners ,however,are taught that the more we have from outside ourselves,the happier we will be and then we are made to want。We are even told it is our duty to want Advertising one of our major industries exists not to satisfy t the students on duty have clsed the windows改疑问句 There is no duty we are so underrate as the duty of being happy i will off my duty today~we can have a chat if we have free time~88请问下面的英文是什么意思?i will off my duty todaywe can have a chat if we have free timeI understand China very much.Only this group of yours likes the S.Korean person who have the duty后面是用for吗? We thought it our duty to take care of the orphans. 为什么不用“We thought it is our duty”呢? 英语题目 词组填空急``1.b_____ down and touch your toes.2.when your class in on duty for the week ,you have to a_______ early for school.3.don't speak to your friends in c_______ when the lesson is going on.4.jasper can't fall sleep that nigh when the teacher speaks ,we have to keep quiet____a won't web don't wec have wed haven't we we don't have any at the moment怎么读? 怎么填We have breakfast at the t------- why don't we have the house painted?还是why don't we have the house painting?为什么? We don't have a plan because we don't know the weather tomorrow同义句 We didn't have enough time.We couldn't finish the work .(合并句子） I have off duty