单项选择题

Jean is a teacher of ______ .

A. computer
B. art
C. mathematics
D. natural sciences
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单项选择题
We can infer from the 1st paragragh that by hit-or-miss it is meant ______.
A. before Google, searching online was impossible
B. before Google, searching online lacked accuracy
C. before Google, searching online was difficult
D. Google is easy to use
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