小题1:its前加and 或把its改为whose或者删掉topic后的was

小题2:thought 后删of

小题3:for 后加the

小题4:choosing →chosen

小题5:presenting→ present

小题6:How→ What

小题7:judge →judges

小题8:have →had

小题9:wildly→ wild

小题10:such →so

题目分析: 在本文中作者讲述了自己参加市演讲比赛的情况，演讲的话题是“People who have overcome difficulties in their lives”。作者认真地准备了这次演讲比赛，结果荣获了演讲比赛一等奖，他永远也不会忘记那一刻。

小题1:its前加and 或把its改为whose或者删掉topic后的was 。  its topic was “People who have overcome difficulties in their lives”.分析结构可知前后两个句子中间没连词，所以可以把its改为whose成为定语从句，也可以在its前加and构成并列句；也可以去掉topic成为独立主格，故答案是its 改为whose或 its前加and 或删topic后的was 。

小题2:thought 后删of 。I thought of my grandma would be my perfect topic. 介词of后只跟名词，代词动名词做宾语，不跟陈述句做宾语从句，故去掉of。

小题3:for 后加the 。 Then I carefully prepared for contest. 此处的contest是特指上文提到的演讲比赛，故前面加定冠词the。

小题4:choosing →chosen 。I was choosing to be one of the seven finalists! 句子主语I 和谓语动词之间是被动关系，应该用被动语态，所以把choosing改为chosen。

小题5:presenting→ present 。I was the sixth to presenting the speech. 修饰序数词the first、the second、the last等后面用动词不定式，所以把presenting改为present。

小题6:How→ What 。How a relief when I finished it ! 感叹句中对名词进行感叹需要用what，句型：what +（形容词）名词+主语+谓语，所以把How改为What。

小题7:judge →judges 。the judge made their final decisions. 根据句中的their decisions可以判断有多名裁判，故把judge改为judges。

小题8:have →had have →had and announced that I have won first prize. 主句谓语动词是一般过去时，宾语从句应该用过去时的相应形式，根据文章内容可以判断应该用过去完成时，故把have改为had。

小题9:wildly→ wild 。The audience were going wildly clapping and cheering ! 动词go在句中是系动词，后面应该跟形容词做表语，故把wildly改为wild。

小题10:such →so 。It was such exciting a moment that I will always remember it. 在such/so…..that句型中，such 修饰名词，so修饰形容词和副词，所以把such改为so。