在短文的空格内填入适当的词，使其内容通顺，每空限填一词，首字母已给。

    A rich man named Richard Ellis had been counting his money．When he finished，he carelessly 1eft a$100 bill on his desk．But when he r  1  for it a short while later，it was gone．O  2 two persons could have seen the bill．One was the maid；the other was the butler．

    The maid told him that she thought it was not safe on the desk and had placed it under a green book．But when they looked，the bill was not there．

    The butler said he had found the bill where the maid had I  3  it．He had put it inside the book．Where he thought there was less chance that somebody would find it．He had written down the numbers so that he would not f  4    them．The bill was between P   5    35 and 36，he said．But when they looked there was no money in the book．

    After hearing their s  6 ，he called the police．It was clear to him that who had taken the money．

1．r             2. O           3．l                 

4．f             5. p           6．s