閱讀下面短文，然后從各題所給的A、B、C、D四個選項中，選出一個最佳選項。

　　Mr. Green owned a few shops and was busy with his work．Once his wife had a fall and broke her leg．She was sent to the hospital and needed someone to look after her．They had several servants, but none of them could do the job．One of his friends brought a girl to Mr. Green．She looked beautiful and strong．Mr. Green liked her at once, and wanted to hire (fll^) her．

　　When the girl went out of the room, the friend said, "I hear she's a little foolish．You'd better ask her some questions．If she answers them well, you can hire her．"

　　Mr. Green agreed and called the girl in again．He asked, "What would you be a servant for?"

　　"My mother is often ill, " the girl said, crying, "I have to stop studying and find work．I want to get some money to buy some medicine for her．"

　　"Where's your father, then?"

　　"He died last year．" answered the girl．

　　"Oh, I'm sorry to hear that, " said Mr. Green, "And how did he die?"

　　"He went to London on business and had a high fever．The doctor couldn't save him and he died in the capital．"

　　"How many times had your father been to London?"

　　"Three times．"

　　Mr. Green was happy．He thought that the girl was not foolish at all, but he wanted to have a last try．So he asked, "Which of the three times did your father die in London?"

　　The girl thought for a while and said, "I'm sorry I don't know．When he died there, I was at school．"

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