单项选择题

The specimens to be analyzed were taken _______.

A．by accident
B．at random
C．on occasion
D．on average
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单项选择题
Computer will _______ because they enable us to accomplish tasks that could never before have been undertaken.
A．thrive
B．flourish
C．prosper
D．multiply
单项选择题
The damage to my car was _______ in the accident, but I have a lingering fear even today.*
A．insufficient
B．ignorant
C．ambiguous
D．negligible
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