单项选择题

As can be gathered from the passage, before 1910 the normal running time of a film was probably ______.

A．15 minutes or less
B．between 15 and 30 minutes
C．between 30 and 45 minutes
D．1 hour or more
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单项选择题
Griffith's film innovations had a direct effect on all of the following EXCEPT ______.
A．film editing
B．camera work
C．range of subjects
D．sound editing
单项选择题
Which of the following is the author implying in paragraph 5
A．Self-criticism has gone too far.
B．Communication is a more comprehensive category than language skills.
C．Evaluating criteria are inappropriate nowadays.
D．This column does not meet the demanding evaluation criteria of today.
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