It's good exercise.为什么good前不用加a?

It's good for exercise every It's good exercise.中exercise做什么语, It's good exercise.为什么good前不用加a? let's walk there.it's good exercise什么意思 1.it's (a) good exercise.为什么有a We should do our ------(good) to do more exercise.It’s good for our health. how about by taxi?it's too expensive!what's your idea?lt's good exercise. You’d better do morning _every day .It’s good to have lots of ___.A exercises ; exercise B exercise ; exercise C exercise ; exercises 应选那个 为什么? Cycling is good exercise.It can make us s后面s开头的单词是什么 It's good for you to take exercise.Yes,it has______me good.A given B wanted C done D helped It's good for us to take exercise as often as p____?应该填什么? 首字母填空： It`s a good way to exercise to s___ slim. It has been proved ____taking exercise regularly does good to one’s health It is good for you_____(exercise)more. it is good for us__(exercise) _____ regular exercise is very important.It’s never a good idea to exercise too close to bedtime.A.It B.As C.Although D.Unless You'd better do morning_every day.It's good to have lots of_.A exercise,exercise B 加s,原型 C 原型 it's good exercise改为否定句which bus should i take?what is it like这两句翻译