I'm going to eat more vegetables to keep f__I'm going to eat more_英语解答

I'm going to eat more vegetables to keep f__
I'm going to eat more vegetables to keep fit.
I'm going to eat more vegetables to keep fitter.
第一句好（对）还是第二句,为什么?

人气：102 ℃　时间：2019-10-10 01:18:00

解答

I'm going to eat more vegetables to keep fit.
这句正确.
我要多吃蔬菜来保持健康.
keep 表示保持某种状态,keep fit 表示保持健康的状态；没有keep fitter这种表达