he say doing sports is a good way to keep fit 为什么这里的do要加ing,

A good way is to write-keep a diary.这里的write-keep是什么意思 首字母填空：e--- a balanced diet is a good way to keep fit swim is a good way for keep fit找错 A good beginning is half of success 这里的 begin 为什么 要加ing doing sports is a good w() to relax and keep f() ,()里填什么 Doing morning _____(exercises\exercise)is a good way to keep 英语作文：Doing exercise is a good way to keep healhty _____ sports is good for us.前面用To do还是Doing.为什么? ing加法的 急drinking enough water is a good habit 为什么要加ING drink Swimming is a good way _______ fit i am doing my homework 为什么这里的do加ing? Do exercises is a good way to keep healthy.这句话错在哪.