Passage OneQuestions 26 to 28 are based on
题型：单项选择题
问题：
Passage OneQuestions 26 to 28 are based on the passage you have just heard.
A．Common sense may be different in various places or times.
B．There is no doubt that virus is the cause.
C．It’s almost impossible to define what is common sense.
D．People often take contradictory attitudes towards one particular thing.
