根据短文内容和所给汉语提示，写出单词的正确形式。每空限填一词。

Mr. Jackson says his favorite great book is The Adventures of Tom Sawyer.  It was小题1: (写）by Mark Twain in the  19th 小题2:_____(世纪）   The  story  is about  a小题3:_____(活泼的）and clever young boy Tom and his friends.  They go looking for treasure(宝藏）on an 小题4:____(岛）in the middle of the Mississippi River.  Mr.  Jackson thinks his favorite scene in the book is when everyone thinks Tom is 小题5:_____(死的）and has a funeral(葬礼），but Tom 小题6:_____(躲藏）and watches，and then suddenly he appears.  The ending of the story really 小题7:_____(使'原奇）everyone.  The themes of the  story are to do with children growing up and becoming more serious.

At the same time，it talks about freedom,  social 小题8:_____(规则)  and how people are punished(惩罚）for bad behaviors.  Finally,  Mr. Jackson asks us to read the book. He is sure if we can put our 小题9:_____(心）into it, we can understand the story 小题10:_____( 容易) .

下列关于信息系统建设环境分析的描述中，不正确的是( )。

A．环境分析必须认真细致，不放过每一个细微枝节

B．内部环境分析的重要内容之一是最高领导层的理解和认识

C．外部环境主要是企业的生存环境

D．环境分析有利于确定信息系统的规模、投资方案等