The collapse of the World Trade Center has put US economy in a difficult __________.

She looked at the pretty vase I bought at the market and said it was a real _____.

It is important to have your eyes examined regularly to check for any sign of eye disease that may not have any __________.

Unless you change your ________ towards your studies, you won’t make any progress, I believe. 

Before the final examination, many students have shown ______of tension. Some have trouble in sleeping while others have lost their appetite.