I don't think she will buy that expensive necklace，________?

A.do I

B.will she

C.don't I

D.won't she

答案及解析： B

解析：

当句中的前一部分是“I don't think/believe/suppose…+that从句”时，简短问句中的动词和主语应和that-clause中的动词和主语相一致，用肯定形式，答案为B.例如：I don't think that he will come in time．will he?They didn't believe that we could hit the target，could we?