问题
单项选择题
She worked hard at her task before she felt sure that the results would （） her long effort.
A．justify
B．testify
C．rectify
D．verify
答案
参考答案：A
解析：
justify one's effort使某人的努力有所值。testify作证；证实。rectify改正；精馏。verify证实，核实。