单项选择题

They have been concerned with the following terms EXCEPT______.

A．millions of instructions per second
B．discount
C．remote connection
D．management committee
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单项选择题
We can learn from the news that______.
A．police provided detail in formations about the girl
B．Tobago has a population of 1.2 million
C．homicide increased in Tobago
D．Tobago is generally a peaceful island
单项选择题
Though it is difficult to remember now, this was not always the case. In the 1st paragraph, this sentence suggests that ______.
A．today Google has become a commonplace way to find information online
B．Google made a great contribution to searching online
C．Google changed a lot
D．Google is different from other search engines
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