I don’t think Bill has finished his maths homework,______?

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I don’t think Bill has finished his maths homework,______?
A.don’t I B.do I C.has he D.hasn’t he

反义疑问句中但当陈述部分的主语是I(we),谓语是think,believe,suppose,expect这类动词时,附加疑问部分则往往与从句中的主语和谓语动词保持对应关系,但要注意否定的转移.
例如：I suppose that he’s serious isn’t he?I don’t think she cares,does she?
所以选C

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