-Sorry,Betty!I forgot to inform you of the change of time.-________.
I don’t think I am __________; it is said that _________ is the mother of success.
--- I’m afraid I can’t return the book to you before Friday.---_______.
They are so busy that they have no time to do any sports, ______they need to do so.
I don't know _______.
Hurry up! The train ______. You know it ______ at 8:30 am.