在职研究生英语（一）
下面句子去掉全部定语从句后的主干是哪一项？ The engineers who …
第 4 题单选题模拟题中等
下面句子去掉全部定语从句后的主干是哪一项？
The engineers who inspected the tunnel concluded that the leaks, which had been reported for months, were caused by a crack that nobody had noticed.
长难句定语从句名词性从句状语从句