Do you know _______ he is from Hainan or not?A. that B. whether C. if
If there is any change to the plan, I ______ you as soon as possible.
—Bob, it’s getting cold outside. ______ take a jacket —All right, Mum.
Some people won’t realize the importance of their health ______ they have lost it.
—Which do you prefer, tea or coffee?—I don’t care. ______ is fine.
Excuse me, I lost my way. Will you please tell me ______?