A 的 each of which are显然不对; B which are each ready to 中的each用法unidiomatic, 而且整句话的意思也没有逻辑; C each one of which are ready 同A D 只有主语, 没有谓语, 严重错误; E 逻辑和语法都正确; each one ready to slide into the appropriate position whenever an active tooth is lost or worn down 作为独立主格修饰前面的句子, 不太好理解, 但正确。 |