单项选择题

Questions 23 to 25 are based on the conversation you have just heard.

A．Online business.
B．Some new products.
C．Cable modems.
D．A new high-speed network.
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单项选择题
A．After he bought his own print shop.B．After he signed some historic documents.C．When he invented the lightning rod.D．When Pennsylvania Gazette became successful.
A．After he bought his own print shop.
B．After he signed some historic documents.
C．When he invented the lightning rod.
D．When Pennsylvania Gazette became successful.
填空题
demonstrate
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