The wrong you have done him is terrible, I think, you should make an apology to him．
A. which
B. what
C. that
D. for which
网友回答
A. which
B. what
C. that
(答案→)D. for which
解析：考查非限制性定语从句。Which指代先行词the wrong在句中做介词for的宾语。Make an apology to sb for sth因为某事向某人道歉。句意：你对他坐的错事真是太糟糕了。我认为你应该因此向他道歉。