— Have you any idea where he comes from?— Judging by his __________, he must be from Hunan.

Even the experienced doctors dare not carry out the operation because of the         of failure.

Some famous singers live on the ___ from their record sales.

There is an obvious _______ between children spending too much time playing computer games and their bad grades at school. 

When I heard about the marriage of Andy Lau, you could have knocked me down with a _______ .