问题
选择题
I don’t think he could have done such a stupid thing last night,__________?
A.do I
B.could he
C.did he
D.has he
答案
C
陈述部分为主从句的复合句,且主句的主语和谓语是I think,I suppose,I believe,I imagine等结构时,附加疑问句的人称和数往往要与从句的人称和数保持一致,并要注意否定的转移。