Life is like sport,_____Imean it's a hard competitive business.答案是by which . why?

Life is like sport,_____Imean it's a hard competitive business.答案是by which . why? playing the sport you like is considered an essential part of a person's life Li Hua does well in sport. (同义句)Li Hua is _ _ _ sport I LIKE. BUT MY FAVORITE SPORT IS . life is like a Life is like a Life is like a life is like a life is like a Life is like sport,—I mean it’s a hard competitive business.A.in which B.by which为什么选择 by which life is like a boat life is like a dream. life is just like dream e-sport for life e-sport for life SPORT LIFE怎么样 填写all sport ( ) life 改为同义句:Which is your favourite sport?What sport do you like best可不可以?