______ he was at home, I would have phoned him then.
As we all know, ______ medcial 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.
There are some students ______ to have known what they don’t really know, which is really harmful to them.