单项选择题

Pure science, leading to the construction of a microscope, ______.

A．is not always as pure as we suppose
B．may lead to anti-scientific, "impure" results
C．necessarily results from applied science and the discovery of a cell
D．necessarily precedes applied science, leading to the discovery of the cell
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单项选择题
The main idea of the first paragraph is that ______.
A．newsrooms are suffering from a decline in standards
B．there a. re too many ethical scandals going on in newspapers
C．there is a perception that newspapers should do more to correct mistakes
D．this has been a rough time for newspapers and many are wondering what is wrong
单项选择题
Who are the kinds of reporters the writer seems to admire most
A．Reporters who know how to sift through a lot of information.
B．Reporters who are willing to sacrifice to chase after a story.
C．Reporters wh9 won't sully themselves.
D．Reporters who are highly trained.
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