I'm not good at G_______,so i must work hard.

I'm not good at G_______,so i must work hard. At work,I must work hard I hope you'll have a good fature,so you must work hard .I th I'm not so good i m not good at I must work hard 是什么意思 i m not good at PE ,so I am not ____ .填空 It's (raining) hard .So I (must) stay (at home). I work hard at school.So ____(do)my brother 怎么回答i'm not so good i'm so hard hard at work school I(?