题目内容：
Directions：In this section,you will hear 3 short passages.At the end of each passage,you will hear some 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 Sheet2with a single line through the center． 注意：此部分试题请在答题卡2上作答。
Questionsare based on the passage you have just heard
请作答______ A．25 millio
B．100 millio
C．50 millio
D．75 millio
参考答案：
答案解析：