--- I’m afraid I can’t return the book to you before Friday.---_______.
——Do you know the answers to these questions asked by your little brother? ——Of course not, but I can’t let him know.
My uncle _________ in Taiwan for 20 years. Now he has settled down in mainland.
The book Robinson Crusoe ________ on the book by Daniel Defoe is well worth ______.
If it was not an accident, he must have done it ___________.
Everyone will have to ______ a test before they are admitted to the university.