第二部分：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
Since I started working part-time at a grocery store, I have learned that a customer is more than someone who buys things. To me, a customer is a person whose memory fails entirely once he or she starts to push a shopping cart(车). One of the first things customers forget is how to count. There is no other way to explain how so many people get in their express line, which is clearly marked 15 items(件) or less, with 20, 25 or even a cart load of items.
Customers also forget why they came to the store in the first place. Just as I finish ringing up
