they must do_duty,as we must do_.we have kept_promise;let them keep_.

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they must do___duty,as we must do___.we have kept___promise;let them keep___.
they must do___duty,as we must do___.we have kept___promise;let them keep___.

they must do___duty,as we must do___.we have kept___promise;let them keep___.
their,ours.our,theirs.
名词性物主代词与形容词性物主代词区别如下
人称代词分主格和宾格,用作主语时用主格,作宾语是用宾格.
主格：I,you,he,she,it,we,they
宾格：me,you,him,her,it,us,them
【I am a teacher.My mother love me.】
物主代词分形容词性和名词性,用作定语起修饰和限定作用时用形容词性,用作主语或宾语是用名词性.
形容词性：my,your,his,her,its,our,their
名词性：mine,yours,his,hers,its,ours,theirs
【This is my book.The book is mine.】

这样做：their，ours。our， theirs。

they must do___duty,as we must do___.we have kept___promise;let them keep___. They must be Chinese They must remember when they __(begin). they must dust the room THEY ALL MUST DIE怎么样 Make a sign to tell people________.A.what they must do B.what do they must C.what must they do D. WHAT THEY DO MUST They must have finished their homework,_______. they must look after .things.填什么 Must they dust the room肯定回答 They must tell him everything.用英语填空 they must arrive_____the village ____time They must ----- (promise) ------ (look) after them well they must arrive?time.填啥） I must( ) these girls.They are poor What must they do?They must have a hoilday.标What must they do?They must have a hoilday.标准译文是: But they must look after themselves. They must be careful的一般疑问句 They must be playing反意疑问句