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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The ______ of schools, stores, hospitals, and so on is an important factor when purchasing a house.
A．publicity
B．proximity
C．purity
D．probability
单项选择题
The opera will be broadcast ______ on television and radio.
A．occasionally
B．simultaneously
C．eventually
D．promptly
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