单项选择题

Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now listen to the passage Which is NOT mentioned as a way of telecommunications

A．Telephones are linked to home computers.
B．Television sets are connected to home computers.
C．Home computers are tied to radio stations.
D．Home computers are connected to telegraph

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