(one primary goal主语 )of UNESCO (is)( to build up 动词不定式作表语表目的) (in which all people can paticipate in .定语从句)
【急 在线等】高三英语单选题 句子结构
(one primary goal主语 )of UNESCO (is)( to build up 动词不定式作表语表目的) (in which all people can paticipate in .定语从句)