单项选择题

In those days, dental equipment was ______ and a visit to the dentist was a painful experience.

A．bizarre
B．advantageous
C．primitive
D．unique
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单项选择题
The tragedy could have been ______ if the crew had followed safety procedures.
A．interfered
B．averted
C．intervened
D．distracted
单项选择题
He never tried to hide his ______ for those who were not as intelligent as him.
A．contempt
B．contest
C．continuity
D．context
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