Thanks to better health care, most people are living {#blank#}1{#/blank#} (healthy) and longer lives. Someone who is born today can expect to live about thirty-five years longer than someone who {#blank#}2{#/blank#} (be)  born in the nineteenth century. Here are five {#blank#}3{#/blank#} (rule) for a healthy life.

    First. Doctors say you should get off the sofa. To keep fit, you have to walk {#blank#}4{#/blank#}介词) least 10, 000 steps every day. In the past, people's jobs required more physical effort. They often{#blank#}5{#/blank#} (have) to walk for miles every day. When farmers were {#blank#}6{#/blank#} (work) in the fields, they were keeping fit at{#blank#}7{#/blank#}(冠词) same time.

    Second. Rest while you can! When we were babies, we {#blank#}8{#/blank#}(sleep) for much of the night. Teenagers do not need as much sleep as babies, but it is important for you to get about eight {#blank#}9{#/blank#} (hour) sleep a night. At weekends, you have {#blank#}10{#/blank#} (get) more time, so use it not just for your friends, but for rest too.