题目内容
15．This is a foot．（改为复数句）These arefeet．
分析 这是一只脚．
这些是脚．
解答 答案：These；feet．分析原句，This is a foot，this的复数是these这些，is的复数是are是，foot的复数是feet，这是一个不规则的变化，故得出答案．
点评 一、规则的可数名词的复数变化规则：1．一般情况加 s：book--books mouth---mouths house---houses girl---girls
2．以 s、sh、ch、x结尾的加 es：class---classes box----boxes match----matches
3．辅音字母+y结尾的变 y为 i加es：city---cities country----countries party----parties factory----factories
4．以 o 结尾的词+es的只有以下词：heroes Negroes tomatoes potatoes zeroes/zeros
以 o 结尾并且词尾有两个元音字母+s radios，zoos，bamboos，（pianos，kilos photos）
5．以f，fe 结尾的 变f或fe为v+es：thief wife life knife wolf half leaf shelf
The thief's wife killed three wolves with some leaves and knives in half of her life．
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3．Not everyone has a chance to be a detective（侦探），but I got one when I was thirteen years old．It happened in 1988．
One afternoon，I was walking down the street when I saw my father's new car．（61）E，but to my surprise，I saw a young woman driving instead．"She has stolen my father's car，"I thought．So I quickly stopped a taxi and got in．I said to the driver，"Follow that new car in front，"and I told him why．
（62）C，so I asked him to call the police．Soon we heard the sound of a police car．The police told the woman to stop the car using a loudspeaker（喇叭）．The taxi came to a stop，too．I got out right then and said to the woman，"This is not your car．It's my father's car．"
The woman smiled and said，"Oh，You're Mr Johnson's younger son，right？I've seen your photo in your father's office．"
Before I could say another word，the woman explained that she was my father's new assistant（店员）．My father had asked her to take his computer to the shop to have it repaired．（63）B．After hearing this，we called my father and he told us what she said was right．The police and taxi driver laughed．（64）A．It was both the first and last time I worked as a detective．
One afternoon，I was walking down the street when I saw my father's new car．（61）E，but to my surprise，I saw a young woman driving instead．"She has stolen my father's car，"I thought．So I quickly stopped a taxi and got in．I said to the driver，"Follow that new car in front，"and I told him why．
（62）C，so I asked him to call the police．Soon we heard the sound of a police car．The police told the woman to stop the car using a loudspeaker（喇叭）．The taxi came to a stop，too．I got out right then and said to the woman，"This is not your car．It's my father's car．"
The woman smiled and said，"Oh，You're Mr Johnson's younger son，right？I've seen your photo in your father's office．"
Before I could say another word，the woman explained that she was my father's new assistant（店员）．My father had asked her to take his computer to the shop to have it repaired．（63）B．After hearing this，we called my father and he told us what she said was right．The police and taxi driver laughed．（64）A．It was both the first and last time I worked as a detective．
| A．I felt sorry B．He lent her his car C．The taxi driver had car phone D．Just then a police car was coming E．I expected to see my father in the driver's seat |