1.My brother knows much as he is young.
2.Do these old men have sports every day?
3.What a big progras you've made in last term!
1.虽然我弟弟很年轻,但他懂得很多.（as)
1.My brother knows much as he is young.
2.Do these old men have sports every day?
3.What a big progras you've made in last term!