单项选择题


Passage Three
Questions 33 to 35 are based on the passage you have just heard.

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.
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填空题
demonstrate
单项选择题
The fast paragraph is intended to ______.
A．suggest that self-medication has a long history
B．define what diagnosis means exactly
C．praise doctors for their expertise
D．tell the symptoms from the causes
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