Some people do not like anything to be out of place;they are never late for work;they return their books on time to the library;they remember people's birthdays;and they pay their bills as soon as they arrive．Mr．Hill is such a man.
Mr．Hill works in a bank,and lives alone．The only family he has is in the next town:his sister lives there with her husband,and her son,Jack．Mr．Hill does not see his sister,or her family,from one year to the next,but he sends them Christmas cards,and he has not forgotten one of Jack's seventeen birthdays.
Last week Mr．Hill had quite a surprise．He drove home from the bank at the usual time,driving neither too slowly nor too fast;he parked his car where he always parked it,out of the way of other cars,and he went inside to make his evening meal．Just then,there was a knock at the door．He opened the door,to find a policeman standing on the door-step.
"What have I done wrong?"Mr．Hill asked himself．"Have I driven on the wrong side of the road?Has there been some trouble at the bank?Have I forgotten to pay an important bill?"
"Hello,Uncle,"said the policeman,"My name is Jack."
Mr．Hill__.
文中“he has not forgotten one ofJack’s seventeen birthdays”即是答案。Jack 17年的生日没有忘记一个。由此推断，Jack的每一个生日他都给他寄点什么。
