题目内容：

阅读下面短文，按要求完成下列各题。

A gentleman once wanted for a boy to help him in his office, and over fifty persons asked for the job. Out of the whole number he chose one in a short time, and sent all the other boys away.

“I’d like to know why you chose that boy,” said a friend, “he didn't even have a recommendation（推荐信）with him.”

“You are mistaken,”said the gentleman, “he had a great many.

“He made his shoes clean when he came in, and closed the door after him; showing that he was orderly（井然有序的)．

“He gave his seat to the disabled old man; showing that he was kind.

“He took off his cap when he came in, and answered my questions quickly and respectfully; showing that he was polite.

“He lifted up the book which I had laid on the floor, and put it on the table, while all the others stepped over it or pushed it aside; showing that he was careful.

“And he waited quietly for his turn, instead of pushing the others aside; showing that he was modest (谦逊的 ) .

“When I talked with him, I noticed that his clothes were carefully brushed, his hair in nice order, and his teeth as white as milk. When he wrote his name, I noticed that his fingernails were clean; instead of having some untidy personal habits.

“Don't you call these things letters of recommendation? I do; and the things that I can discover a boy by using my eyes for ten minutes, is worth more than all the fine letters that he can bring.”

1.How did the gentleman know the boy was polite?（根据短文内容回答问题）

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2.Why did the gentleman lie the book on the floor?（根据短文内容回答问题）

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3.How many reasons made the gentleman choose that boy?（根据短文内容回答问题）

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4.从短文中找出与下面句子画线部分意思相近的单词或短语。______________________

Over fifty persons asked for the place.

5.What can you learn from this passage?

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