在远古时代，人类用水钟、日晷、燃油钟和沙漏等来计时。

一小物块在开口向上的半圆形曲面内以某一速率开始下滑，曲面内动摩擦因数不同，此摩擦作用使物块下滑时速率保持不变，则下列说法正确的是（     ）

    It was Mr. Hill's birthday. He was one hundred ____old and many people ____to his birthday party. A reporter came to the party and ask him a few ____."Many people want to know how you keep ____," the reporter said, "Could you ____us about  it " "That is because I____get up at six in the morning," said Hill."And have three ____ a day and ____ drink alcohol(酒)" "Really? said the reporter, "my uncle also did the ____,and he only lived to ____ eighty. What do you think of that?" "He didn't keep it long enough,"  the old man answer.