The wrong you've done him is terrible,_____ you should make an apology to him,I think．
问题描述：
The wrong you've done him is terrible,_____ you should make an apology to him,I think．
A．to which B．for that C．to what D．for which
答
D．for which请问原因for which 或 for whatyou have done是固定搭配对你做的事情的意思