Many period in history ,including the Stone Age and the Iron Age ,_ _ _ after material .A .name B .are named C .have nam

问题描述:

Many period in history ,including the Stone Age and the Iron Age ,_ _ _ after material .A .name B .are named C .have named D .have been named 为什么选D,请分析每个选项.

首先,由于是被命名,且name做主句的动词,所以要用被动语态be named,又因为命名这个动作是在过去发生,且对现在有影响,所以用现在完成时.故为have been named