I don’t know _______ or notI’ll be free tomorrow.
举一反三
- I don’t know __________ I’ll be free tomorrow.
- I don’t know if he _______ tomorrow. If he _______, we’ll climb the mountain.
- I don't know if she _______ to my birthday party tomorrow. If she ______, I'll be very happy.
- 1. I don’t know _________ he will come tomorrow. _________ he comes, I’ll tell you.
- —I don’t know ______ he will come tomorrow.—Don’t worry. If he comes, I’ll tell you. A: whether B: B. where C: C. why