()morning exercises is good ()you.a:doing,for.b:do,for.c:doi

()morning exercises is good ()you.a:doing,for.b:do,for.c:doi _____morning exercises is good for us.A.Do B.Doing Doing morning exercises is good for you .句首为什么用doing?谢谢 Doing morning exercises is good for us.（同义句） Doing morning exercises is good for us.(同义句) ____ （ ） morning exercises is good for our health.(do) Ben ( ) morning exercises now.A do B does C doing D is doing doing eye exercises and morning exercises (be) good for heal doing morning exercises --------(be) good for our health Doing Morning exercises _____(are) good for us. doing morning exercises _____(be) good for you.,但我认为是ARE,这里主 小学英语句型转换doing morning exercises is good for us(同义句转换)______d