I don’t think they will help us ?A. do IB. don’t IC. will theyD. won’t they

问题补充：

I don’t think they will help us, ?

A. do I

B. don’t I

C. will they

D. won’t they

答案：

A. do I

B. don’t I

(答案→)C. will they

D. won’t they

解析：考查反义疑问句。主句动词是think时，反义疑问句是对从句提问，I don’t think they will help us是否定前移，实际上是否定从句they will help us，所以反义疑问句句用肯定形式，上文用助动词will，反义疑问句也用will.所以选C。