If these trousers are too big, buy a smaller＿＿＿．

 If you are looking for a ______, you can make it when it is on sale.

The Klondike was the_____ of one of the biggest gold rushes the world has ever known.

We look forward to the day when motorcars will be replaced by some less dangerous ____ of transport.

There is reason to believe that most writers have difficulty in ______ the opening paragraphs of their papers.