2. I’m quite fit. 我相当健康。
fit adj.健康的；合适的；恰当的；得体的
①He runs 3 miles every morning; that's why he is so fit. 他每天早晨跑三里路，因此才那么健康。
②He by doing exercises every morning. 他每天早上做操保持健康。
③That dirty dress is not fit to wear那件脏衣服不能穿了。
④He's been ill and work yet. 他一直在生病，尚不能工作。
答案：②keeps fit ④isn’t fit for
【拓展】
fit v.合适；合身
①Her new shoes didn't fit so she took them back to the shop and changed them for another pair.
她那双新鞋不合穿,所以她去商店换了一双。
②The trousers don't fit him； they are too small. 这条裤子他穿不合身，太小了。
提醒：fit作动词时，主语一般是物。
