A teacher may also make a mistake if he or she is not _______.
—Excuse me, Mr. Green. How can I______my spoken English? —You can join an English club.
—Can you tell me why you learn English so well? —It’s easy. _________you work, _________grades you can get.
I want to go to the movie tonight. But my parents don’t agree________me.
He is so old that he can _____ himself now.
—I don’t know your e-mail address. Could you please_______here? —Sure.