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He had no idea of what he should say in answer to the questi

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He had no idea of what he should say in answer to the question,( ) he
A.did he B.should he
为什么答案是选A的呢,搞不懂
你首先要搞明白,这个句子的主谓宾结构
主语是he
谓语动词是had
what he should say in answer to the question,是作为介词of后面的宾语存在的,称为宾语从句.
反义疑问句,都是对句子的谓语进行提问的,所以这里是对had进行反问,had的原型是have,这里用了一般过去时,所以用did he,选A.