第五部分：根据句意完成句子（10分）
1. If you c_______ British football with American football, you’ll find many differences.
2. He a_____ to get a higher position, but he failed because of his age.
3. I think the job being a salesman is really s____, so I want to change an easy one.
4. The temperature was so low that the wet clothes f_____ on the clothes line.
