单项选择题

One of his eyes was injured in an accident, but after a ______ operation, he quickly recovered his sight.

A．precise
B．considerate
C．delicate
D．sensitive
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单项选择题
The millions of calculations involved, had they been done by hand, ______ all practical value by the time they were finished.
A．could lose
B．might lose
C．would have lost
D．ought to have lost
单项选择题
Have you a funny ______ or unusual experience that you would like to share
A．amusement
B．incident
C．accident
D．section
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