单项选择题

If the machine had been cheaper, it might well have ______.

A．caught up with
B．caught up on
C．caught on
D．caught out
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单项选择题
Research universities have to keep up with the latest computer and scientific hardware ______ price.
A．not to mention
B．in addition to
C．on account of
D．regardless of
单项选择题
At that time, most people ______ the notion ______ the sun revolves around the earth.
A．take; for granted that
B．took; for granted that
C．took; for granted which
D．took; for granted which
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