问题
选择题
The practice of children working in factories has nearly ________.
A．died out
B．died off
C．called out
D．called off
答案
A
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。
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