专四专八考试

【单选题】Questions l4 to 17 are based on the following passage.At the end of the passage, you will be given 20 seconds to answer the questions.
Now listen to the passage.


What cause the prices of the telephone system to lower inAmericaA．The materials became cheaper.
B．There was more competition.
C．More people used the phones.
D．The phones were connected across the seA、

网考网参考答案：B
网考网解析：
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