词形转换（共8小题，计8分）
小题1: It is necessary for everyone to brush his ________ after each meal. (tooth)
小题2: I have bought a new flat and it’s on the ________floor of the building.(nine)
小题3: As middle school students, we should know how to look after________. (us)
小题4:The student missed the ________tour around Donggao Park. (enjoy)
小题5: We received Peter’s _______and went to his birthday party happily. (invite)
小题6: (luck), John got back the notebook that he had lost at the cafe.
小题7: It was _________for such a little girl to solve this hard problem in ten minutes. (usual)
小题8: Make a plan for your future study, and you will ________in the end. (successful)
小题1:teeth
小题2:ninth
小题3:ourselves
小题4:enjoyable
小题5:invitation
小题6:Luckily
小题7:unusual
小题8:succeed
题目分析：
小题1:句意：饭后刷牙对于每个人来说都是有必要的，tooth 是可数名词，复数为teeth
小题2:句意：我买了一套新公寓在九楼，楼层数表达用序数词，提示词 the
小题3:句意：作为中学生我们应该知道如何照顾自己，look after oneself 照顾自己，根据主语是we，故oneself 为 ourselves
小题4:句意：那名学生错过了环绕Donggao 公园的旅行，enjoyable形容词修饰名词tour做定语
小题5:句意： 我们收到了Peter的邀请，并高兴的去参加了他的生日宴会，应填 邀请的名词形式invitation
小题6:句意：幸运的是，John 拿回了他丢在咖啡馆的笔记本，luckily是副词，“幸运地”，通常放在句首，表示“幸运的是……”.
小题7:句意：对于这样一个小女孩来说，10分钟解答出这样一个难题不寻常。根据句意应填 unusual
小题8:句意：为你未来的学习制定计划，你最终一定能成功，will后跟动词原形，seccessful的动词形式为succeed