试题题干
That is the reason____________(for) he is leaving so soon.
参考答案
试题解析
从句部分完整成分为he is leaving for the reason。for which 是介词＋which结构，关系副词why含义相当于＂介词＋which结构＂，因此常常why和＂介词＋which＂结构互换。
That is the reason____________(for) he is leaving so soon.
从句部分完整成分为he is leaving for the reason。for which 是介词＋which结构，关系副词why含义相当于＂介词＋which结构＂，因此常常why和＂介词＋which＂结构互换。