In the past twenty years great changes _______in China.
— Was it not until last week ______ he decided to give up smoking?— No. He began _____ he saw the new film last month.
— Sorry, I _______ to buy the book you need for you.— Never mind. _______ it myself after school.
—_______ he have been chosen as captain of our school football team? — Yes, he _______. Can’t you see he’s wearing an armband(袖标)?
When I spent my holidays in Europe, I bought _______ vases.
The last thirty years _____ the greatest number of laws stopping our rights and progress.Until today we have reached a stage _______ we have almost no rights at all.