Today we're going to practice evaluating the main tool used when addressing groups- the voice.
问题描述：
Today we're going to practice evaluating the main tool used when addressing groups- the voice.
used 后面整个是过去分词做定语吧when句子中省略了什么 the voice是tool的同位语么
答
used 后面整个是过去分词做定语吧 when句子中省略了什么 the voice是tool的同位语么
你的理解是对的
when后省略了we are