题目内容：

阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

According to a review of evidence in a medical journal, runners live three years 1.(long) than non-runners. You don't have to run fast or for long2.(see)the benefit. You may drink, smoke, be overweight and still reduce your risk of 3. (die) early by running. While running regularly cann't make you live forever, the review says it 4. (be) more effective at lengthening life5. walking, cycling or swimming. Two of the authors of the review also made a study published in 20146.showed a mere five to 10 minutes A day of running reduced the risk of heart disease and early deaths from all 7.(cause).

The best exercise is one that you enjoy and will do. But otherwise…  it's probably running. To avoid knee pain, you can run on soft surfaces, do exercises to8.(strength)your leg muscles(肌肉),avoid hills and get good running shoes. Running is cheap, easy and it's always9.(energy).If you are time poor, you need run for only half the time to get the same benefits as other sports, so perhaps we should all give10.a try.