(6-8)
      My grandfather is eighty-two years old, but he looks much younger； We all want to know how he makes it. The secret is     6.     .He gets up at five o'clock and goes jogging in the park every morning. He also goes swimming or hiking when he has free time. These are the ways to keep him healthy.
       Besides, he always wears a smile on his face and he is very    7.     people around him. That's why he is warmly welcomed wherever he goes. Grandpa says that he loves to talk with young people and    8.   .He knows what is popular now. I also like to share my feelings with him; He is the one who understands me most in my family.
 secret 秘密
6.
(A) delicious and healthy food
(B)exercising and smiling often
(C)going to bed and getting up early
(D)making friends with young people