用所给词的正确形式填空
【小题1】I’m very interested interesting (interest) in thatsupposed (interest) story.
【小题2】You arecutting (suppose) to shake hands when you meet a Chinese friend.
【小题3】A knife is used forlongest (cut) things.
【小题4】The Yellow River is the secondto dress (long) river in China.
【小题5】The boy is old enoughinterested interesting (dress) himself.
【小题6】December is thesupposed (twelve) month in a year.
【小题7】I decidedcutting (talk) to my parents about it .
【小题8】We stayed there for a long time without longest (say) a word.
【小题9】I have five to dress (knife).
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解析：
【小题1】be interested in表示某人对某事感兴趣，interesting表示有趣的，修饰事物，故本句空格处填interested interesting。
【小题2】be supposed to do表示理应做某事的含义，故本句空格处填supposed。
【小题3】介词for后跟切的动名词形式cutting。
【小题4】本句的含义为黄河是中国第二长河，故本句空格处填长的最高级longest。
【小题5】enough to do sth表示足以做某事的含义，故本句空格处填to dress。
【小题6】本题的含义为12月份是一年的第十二个月，故本句空格处填12的序数词twelfth。
【小题7】decide to do sth表示决定做某事的含义，故本句空格处填to talk。
【小题8】介词后without后跟说的动名词形式saying。
【小题9】本句的含义为我有五把小刀，故本句空格处填小刀的复数形式knives。