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.


Before theBellCompany became a publicly held corporation, how were the calls passed to their destinationA．Manual switchboards.
B．Reading manuals.
C．Electronic switchboards.
D．Voice switches.

网考网参考答案：A
网考网解析：
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