You will succeed in the end ________ you give up halfway.
— Did you plan to meet here? — No, we met ________.
We arranged to meet at 8:00, but she didn’t ______.
Don’t try to cheat the taxman(税务人员); you’ll never ______it.
—Would you like some more chicken?—No,thanks. I am ________a diet and I’m trying to ________weight.
He sat at the desk, __________ a novel.