高中英语语法难题the publisher will send you a specimen copy of his new book ( )A when they are requestedB when requested为啥我觉得两句意思一样啊，B不就是A的省略嘛！请指教
问题描述：
高中英语语法难题
the publisher will send you a specimen copy of his new book ( )
A when they are requested
B when requested
为啥我觉得两句意思一样啊，B不就是A的省略嘛！请指教
答