We are looking forward to _________ a chance to watch the opening ceremony of Shanghai World Expo.
The news about the terrible flood there greatly discouraged ______ these for a sight-seeing .
He's unlucky , and he's always suffering _____ luck one after another .
Our decision _____ was wise .
I couldn't have got to the meeting on time - _______ an earlier train .
I'd better not catch ______ that again !