单项选择题

In this private school, a dentist ______ the pupils' teeth twice a week.

A. injures
B. instructs
C. inspects
D. informs
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In his report of the accident be ______ some important details.
A. missed
B. wasted
C. escaped
D. failed
单项选择题
A good writing ______ clear organization and choices of words.
A. calls on
B. calls for
C. calls up
D. calls off
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