—Why haven't you bought any butter?—I ____ to, but I forgot about it.
As we all know, ______ medical examination will help out health problem as early as possible.
—Why didn’t you come to the cinema with us last Saturday? —Oh,sorry.But I ________the film.
Naturally I will come to you for advice whenever I feel I need________
We have every reason to believe that __ 2010 World Expo in Shanghai will be _____ success.
It is believed that this book is _______ worth reading than that one.