注：The twins are so much alike that I never know which is which．句子中＂誰是誰＂用的是＂which＂請告訴我相關的用法

熱心網友

=The twins are so much alike that I never know how to tell whom from whom．(which這里其實是which one/twin的縮寫）

熱心網友

用who,比較合適.