The practice of children working in factories has nearly .
A. died out
B. died off
C. called out
D. called off
网友回答
(答案→)A. died out
B. died off
C. called out
D. called off
解析：句意:工厂使用童工的做法已经几乎绝迹了。die out绝迹；die off相继死去；call out 大叫；call off 取消,要用被动形式。