增加：在缺词处增加一个漏字符号（^）并在其下面写出该加的词

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在改词下面写出修改后的词。

注意：1. 每处错误及其修改均仅限一词。2. 只允许修改10处，多者（从第11处起）不计分。

    I couldn’t believe my ears when I heard my name calling. I was chosen to play the leading role in a play, that was my dream. As a shy and thin girl, I used to being quite afraid of speaking in the public. But my parents and teachers always encouraged me to do so. What they said had a deep influence of me. By now I changed greatly. In class, I am often the first one to stand up and answer questions even if I may take some mistakes. Now I am delightful that I’m brave enough to overcome the difficulty in my heart. My experience shows that we should not be afraid of losing face but only in this way can we make progresses.

下列计算正确的是（　　）

2010年10月9日《中国经营报》发表题为“本周聚焦二‘嫦娥’奔月”的文章指出，“嫦娥二号”10月1日完美升空，对中国的航天事业发展意义重大。中国进入航天时代的标志是

已知公差不为0的等差数列$\left\{a_n\right\}$满足$a_1$，$a_2$，$a_3$成等比数列，$S_n$为$\left\{a_n\right\}$的前n项和，则$\frac{S_3-S_2}{S_5-S_3}$的值为           （   ）