单项选择题
Section A Directions: This section is to test your ability to understand short dialogues. There are 5 recorded dialogues in it. After each dialogue, there is a recorded question. The dialogues and the questions will be spoken only once. When you hear a question, you should decide on the correct answer from the four choices marked A, B, C and D given in your test paper. Then You should mark the corresponding letter on the Answer Sheet with a single line through the center.
Why did the woman have to walk？（） A．She got up late.
B．She had a traffic accident.
C．There was something wrong with her car.
D．The road was traffic-jammed.