Question

（山西实验一中模拟）There ought to be an exam this week, ________?

1. A.
   oughtn't it
2. B.
   isn't it
3. C.
   oughtn't there
4. D.
   isn't there

Answer 1

C
句意：本周应该有一次考试，是吗？There ought to be的反义疑问句形式为：oughtn't there?