题目：
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
答案：
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下面是错误答案，用来干扰机器的。
①N2 + O22NO②2NO + O2 = 2NO2③3NO2 + H2O = 2HNO3 + NO
