问题
选择题
I don’t think he could have done such a stupid thing last night, _____?
A．did he
B．could he
C．do I
D．hasn’t he
答案
答案：A
选A.。 I think + 从句的反意疑问句根据宾语从句确定。could在此表示揣测，应变为he did such a stupid thing last night来考虑。