We all know that doing morning exercises ______. A．is good f

We all know that it is a good habit to wash hands ______ mea We all know that doing sports is good for our health Doing morning _____(exercises\exercise)is a good way to keep ()morning exercises is good ()you.a:doing,for.b:do,for.c:doi Doing morning exercises is a good habit.(改为同义句） Doing morning exercises is good for us.（同义句） Doing morning exercises is good for us.(同义句) ____ We find ___ good to do morning exercises.A this B that C one we is doing morning exercises on the playground We all know that regular physical exercise is good for a gir ______ we all know,air is gas.A、As B、Which C、That D、What Doing morning exercises is good for you .句首为什么用doing?谢谢