第一部分：阅读理解 （共两节，满分40分）
第一节 （共15小题；每小题2分，满分30分）
阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。
A
Visitor Oyster cards are electronic smartcards that come fully charged with credit. Whether you're making a one-off trip to London or you're a regular visitor, using an Oyster travel smartcard is the easiest way to travel around the city's public transport network. Simply touch the card on the yellow card reader at the doors when you start and end your journey.
