阅读下面短文，根据上下文意义和所给单词首字母，写出标有题号的每小题空白处适当单词的完全、正确形式。（每空一词）

Joe was a good boy．He was seven years old，and he was going to school soon．B  1    Joe had a shortcoming（缺点）．He could not get up early．He often slept until（直到）nine or ten o’clock in the morning．

His mother didn’t want him to be l  2   for school．S  3   she bought him an alarm clock（闹钟）．She s  4   to Joe．“You must get up when you hear the clock ring（响）．”

“Yes，Mum．”Joe said．From then on，Joe got up at six thirty e  5   morning when he heard the clock ring．

One day，his mother f  6   to wind up（上发条）clock．And the next morning Joe didn’t get up at six thirty．It was time for breakfast．Mother went to w  7   him up．Tom was in bed and his eyes were open．He said to his mother，“I woke up very early．”

“Then w  8   didn’t you get up?” Mother a  9  ．“You told me that I must get up w 10  I hear the clock ring．So I am now waiting for the clock to ring．”

how, much, safe, thank, play , be, invent , no, so , interest, must , ask

Thomas Edison was a great American 1.________  . When he was a child, he was always   2.________  questions and trying out new ideas. No matter  3.________  hard it was, he never gave up.

Young Tom was in school for only three months. His teacher didn’t understand why he had  4.________  many strange questions. Most of them were not about his lessons. The teacher didn’t want to teach Tom any 5.________ . He asked Tom’s mother to take the boy home. Tom’s mother taught him to read and write, and she found him  6.________  a very good pupil. He learnt very fast and became very  7.________ in science.

One day , he saw a little boy   8.________ on the railway tracks at a station. A train was coming near quiclly, and the boy was too frightened to move. Edison rushed out and carried the boy to  9 .________. The boy’s father was so  10.________  that  he taught Edison to send messages by telegraph.