根据下列句子及所给汉语注释，在相应的横线上写出各单词的正确形式。
【小题1】It is good manners to greet (问候) each other with a smile.
【小题2】Since the exam is approaching (靠近)， all the students are busy with lessons.
【小题3】You can see various (各种各样的) kinds of animas in the preserve.
【小题4】Do you know the length (长度) of the river?
【小题5】They finally gained admission (允许进入) to the party.
【小题6】The soldiers swung (摆动)their arms at the same pace as they marched.
【小题7】Only a minority (少数) of the students were for his opinion.
【小题8】Who is to represent (代表) our school to attend the conference?
【小题9】Adults （成年人）should set good examples to children.
【小题10】In such weather, I prefer to stay in my dormitory (宿舍), reading novels.
【小题11】Don’t be too curious (好奇的) about others’ personal affairs.
【小题12】In most cases he had great courage to overe (克服) difficulties.
【小题13】Tourism (旅游业) in our city is developing very fast.
【小题14】We should take his health into consideration (考虑).
【小题15】On no occasion (场合)can we behave like that.
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解析：
【小题1】greet 动词问候：greet
【小题2】approaching 动词靠近：approach，本题是进行时，故使用现在分词的形式。
【小题3】various 形容词各种各样的：various
【小题4】length 名词长度：length
【小题5】admission 名词允许进入：admission
【小题6】swung 动词摆动：swing，本句为过去时，故使用过去式。
【小题7】minority 名词少数：minority
【小题8】represent 动词代表：represent
【小题9】Adults 名词成年人：aduit,与后面的children构成对比，所以使用复数形式。
【小题10】dormitory 名词宿舍：dormitory
【小题11】curious 形容词好奇的：curious
【小题12】overe 动词克服：overe
【小题13】Tourism 名词旅游业：tourism
【小题14】consideration 固定词组：考虑take sth into consideration
【小题15】occasion 名词场合：occasion,与介词on连用。