He doesn’t know _________ (if / whether) to stay or not.
举一反三
- He doesn’t know ______ to stay or not. A: whether B: if C: either D: if he will
- He doesn't know ____to stay or not.
- He doesn't know____ to say or not. A: if B: .either C: whether D: if he will
- He doesn't know to say or not. A: if B: eithe C: whethe D: if he will
- I don’t know ______ or not. A: whether he is at home B: if he is at home C: that he is at home D: whether is he at home