阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳答案。

Australia has very strict laws relating to the importation and possession of certain goods. Food, plant material and animal products from overseas,

including many common souvenirs, could introduce some of the world's most serious pests and diseases into Australia. Failing to declare quarantine items

(需要检疫的物品) on arrival could destroy our agriculture, tourism industries and special environment.

Every piece of luggage will be screened or x-rayed on arrival in Australia. So you must declare for inspection of all food, plant material and animal products to check that they are free of pests and diseases.

You must tick YES on the Inoming Passenger Card(IPC) to declare if you are carrying any food, plant material or animal products. In signing the IPC, passengers are making a legal declaration and failure to answer all questions truthfully can have serious consequences.

If you fail to declare or dispose of(处理)any quarantine items, or make a false declaration:

* you will get caught;

* you could be fined over A $ 200 on the spot; or you could be prosecuted and fined more than A $ 60,000 and risk up to 10 years imprisonment;

If you are not sure about the items you are carrying, ask a quarantine officer who will determine whether they are allowed into Australia.

48. The reason why you are asked to declare quarantine items on arrival is that _________.

    A. too many overseas products could destroy Australia's tourism industry.

    B. animal products are often the cause of various diseases.

    C. as is known to us all, bad food can spread diseases easily.

    D. these items may carry dangerous pests or diseases into Australia.

49. You need to declare the following things EXCEPT _______ if you have them in your luggage.

A. some metal hairclips       B. dried flowers

C. some moon-cakes         D. a bottle of honey

50. The underlined word prosecuted may probably means:

   A. officially charged                    B. hardly punished   

C. informally blamed                   D. immediately driven out

51. For what purpose is the passage written?

   A. To inform the passengers of the law on the exportation of goods.

   B. To warn the passengers not to take unsafe goods.

   C. To tell the passengers to Australia to have their quarantine items declared.     

D. To urge the passengers to protect the agriculture, tourism and environment.

52. If you don't declare quarantine items, ________.

   A. you can probably get away with it

   B. you are sure to be discovered and punished

   C. you can turn to the customs officers for help

   D. you can give them away to a quarantine officer