题目内容：
听音频，回答题Section C
Directions：In this section，you will hear three passages．At the end of each passage,you will hear three or four questions．Both the passage and the questions will be spoken only once．After you hear a question，you must choose the best answer from the four choices marked A，B，C,and D,Then mark the corresponding letter on Answer Sheet l with a single line through the centre．
Questions 16 tol8 are based on the passage you have just heard．
A．The card got damaged．
B．The card was found invalid．
C．The card reader broke down unexpectedly．
D．The card reader failed to do the scanning．
参考答案：
答案解析：