单项选择题

She worked hard at her task before she felt sure that the result would _______ her long effort.

A．justify
B．testify
C．rectify
D．verify
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单项选择题
Malnutrition may well be _______his ill health.
A．the reason of
B．due to
C．the cause of
D．owing to
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
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