—Whose English book is this?
—It _______ be Lily’s, but I’m not sure.
might
can’t
must
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 ______?
Paul isn’t as ______ as Sandy. He often makes mistakes in his homework.
—______ is it from your home to the school? —About ten minutes’ walk.