下面这则邀请函有三处语言表达不得体，请找出来并加以改正。

                                                                                                           邀请函

      贵校第五届艺术节将于9月24日~30日举行。我们向教育系统的各位领导、教师及各位家长、校友发出鼎力邀请。届时，您会欣赏到花的绽放，舞的优雅；您会聆听到琴的悠扬，歌的高亢。这里洋溢着青春的激情，激荡着创造的魅力；这里是心灵驰骋的原野，是放飞梦想的蓝天。

      同行在热情相邀，孩子在期待，母校在召唤。恭候您的惠顾!

××中学

2014年9月10日

①       将____改为____； 

②       将____改为____； 

③       将____改为____。 

用基因型为DdTt的植株所产生的花粉粒，经分别离体培养成幼苗，再用秋水仙素处理，使其成为二倍体，这些幼苗长成后的自交后代（    ）

漂白粉（由Ca（ClO）₂和CaCl₂组成）是生活和工业中常用的漂白剂．工业上生产漂白粉的化学反应方程式为：2Ca（OH）₂+2X=Ca（ClO）₂+CaCl₂+2H₂O．

（1）X属于____ （填物质类别）

（2）次氯酸钙是漂白粉的有效成分．次氯酸钙在潮湿的空气中久置会生成具有漂白性的物质次氯酸（HClO）和难溶于水的白色固体，反应的化学方程式　____ 　，该反应的基本类型是____．

（3）工业使用漂白粉时常根据（2）中的反应原理，通过添加少量的____ （填序号）物质来解决漂白粉漂白缓慢的问题．A．氢氧化钠   B． 稀盐酸   C． 氢氧化钙   D． 氯化钠．

（2015•广东佛山）

 Bert Manson, 82, slowly opened his eyes and turned to face the clock on the bedside table. It was 8:23 a.m. He felt1. The time was nothing to him. He had nothing to do all day. He lay on the bed, 2 to the cars on the highway and the shouts of the children running to school.

 After a while, Bert 3 got out of bed and asked himself the same questions as he did every morning: Would he fall today? If so, would anyone come? How long would he 4? Would he die? He looked out of the window into the street below. “And who would 5?”he spoke quietly.

 After Bert's wife died a year ago, his son and daughter said they would visit once a week. But the last time was months ago. On the phone, they always had a(n)6: too busy at work; the children are 7; bad weather; no time. Nobody seemed to have any time…except for Bert. He 8 his granddaughters. He loved it when Mandy and Ruth came to visit. They brought him candy and 9.

 He walked to a chair near the bedroom door 10. He rested for a moment before continuing in small steps to the bathroom.