问题
选择题
The stamps were ________ according to their styles and features.
A．found out
B．sorted out
C．put out
D．taken out
答案
答案：B
本题考查动词短语辨析。find out“发现，找出”；sort out“分类”；put out“扑灭(火)”；take out“提取出”。句意为：这些邮票根据它们的样式和特点被分类出来。