He was unhappy when he sold his violin.After all,he ____________ it for a very long time.
Three years had gone by ____ he came to realize what a fool he was not to listen to the teachers !
To finish the homework, he spent four hours _______ in the study.
— What did you think of her oral English? — I was very ______.
You can’t imagine what difficulty I had _______ my parents to let me take part in a make-up show .
Actually, ___works hard can be__they want to be, whether it is a pilot, an engineer or a manager.