单项选择题

According to the passage, ______ appeared earlier than ______.

A．apples; oranges
B．oranges; apples
C．oranges; roses
D．algae; wheat
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单项选择题
What does the word malfunction mean in paragraph 1
A．失误
B．制造
C．影响
D．事情
单项选择题
According to the passage, the initial concern about computer was that they might ______.
A．change our personal lives
B．take control of the world
C．create unforeseen problem
D．affect our businesses
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