I ___ at the door since, in this way, I awoke the ...

★ Modals with Perfect Infinitive

I ___ at the door since, in this way, I awoke the baby.

A. needn’t have knocked

B. can’t have knocked

C. mustn’t have knocked

D. should have knocked

Preview next quiz:

A: I’ve opened another bottle. B: You ___ done that. We haven’t finished this one yet.

A. shouldn’t have

B. can’t have

C. mustn’t have

D. ‘d rather not