题目内容
7．They have just had adiscussionabout where to spend their holidays（discuss）分析 他们刚刚讨论了去哪度假．
解答 答案：discussion．句中的a是不定冠词，后加名词单数，discuss是动词讨论，加上ion构成名词discussion讨论，故答案是discussion．
点评 加上后缀ion构成名词的有attraction action connection invention pullute-pollution donate-donation educate-education operate-operation
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