Question

I don't think he could have done such a stupid th

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

Answer 1

类似I think及I think否定转移结构中宾语从句的附加疑问补充问题需要认真理解其句义，然后才能顺其自然找到答案。简单说就是摒弃I think或者i don't think 中的i think,不预考虑i think的存在，只根据宾语从句来决定附加疑问句即可。
这句话中除了使用了i don't think干扰项,在宾语从句里还融合了情态动词推测用法，对于这种情况，请按实际情况来处理附加问句，即，he did NOT do such a stupid thing last night ,该句子的附加问句应该是：did he.所以这个题的答案应该是C
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