The best way to explore _______ countryside is on _______foot.
— Was it not until last week ______ he decided to give up smoking?— No. He began _____ he saw the new film last month.
_______ the best in a recent science competition, the three students were awarded scholarships ________21,000 dollars.
.— 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.