Choose the best answer to fill in the gaps in each of following questions so that the second sentence means the same as the first one.
It was a bad idea for us to be rude to the policeman!
→ We _____________ been rude to the policeman!
A. couldn’t have
B. needn’t have
C. mustn’t have
D. shouldn’t have
Answer the question before viewing the answer below
Correct answer: D