Have you heard about Post Office Cats in Britain? They are mouse hunters. The post office

Have you heard about Post Office Cats in Britain? They are mouse hunters. The post office has actually employed cats since 1868. They are not employed to sort or deliver mail, of course, but to protect the mail and keep the population of mice under control. They make sure your morning post arrives free from damages caused by rats and mice.
London post offices were the first to try out the experiment. Within a few months the population of mice had shrunk sharply. Other post offices all over the country were soon using cats in the war against rats and mice as well. Within ten years the pay of the cats was improved from one and a half old pence a day to six or nine pence a day. Now the average rate of pay is about a few pounds a month.
Some of the hard-working cats have bee quite famous. In 1980, a cat named Lucky stopped an attempted robbery in a Worcestershire post office on her own. As the two burglars made their way in through the window, Lucky started an attack and they fled empty-handed. Another excellent cat was Jerry, of Earls Court post office in London. He served the building for 16 years and was on duty for 24 hours every day. He drove all the mice away.
However, there are fewer cats employed by the post office than at any time in the past. With the faster movement of the mail and better surroundings, post office cats are not always needed. But many post offices still employ them and they bee great friends with the postmen. According to the post office, there is no plan for their services to be discontinued in the foreseeable future.
【小题1】Cats were introduced to British post offices to     .A．help sort and deliver mails and papersB．guard the building against thievesC．keep mails and papers undamagedD．search for certain dangers in mails【小题2】The underlined word “shrunk” in the second paragraph probably means “    ”.A．decreased B．increasedC．narrowedD．expanded【小题3】The cat named Lucky became famous because    .A．She served the post office for 16 years around the clock.B．She alone drove two burglars away from the post office.C．She protected mails from being bitten by mice.D．She was employed to sort and deliver mail.【小题4】We may learn from the last paragraph that    .A．the duty of the cats has been replaced by machinesB．all the post offices are now pletely mice freeC．cats are now considered of little use in post officesD．cats will still be seen in service for quite a long timeC