题目

Swimming is indeed a great kind of sport. Here are the top four health benefits of swimming that you should keep in mind to keep yourself up, energetic, and active.【1】 According to several studies conducted by health experts, people over 40 have experienced great improvement in the systolic(心脏收缩的) blood pressure after two weeks of regular swimming activities. It improves the function of the blood vessels( 血管)，which is actually beneficial to the heart and lungs.It burns fat and shapes bodies. Whether you are in shape or not, swimming is a relaxing way of getting fit.【2】 13．What was/had been confirmed in the investigation was a great shock to everybody related．（ confirm ）在调查中所被证实的事让每个相关的人都大吃一惊．