.Good morning,_____!.A.Class B.student C.everyone D.boy and girl我想知道为什么D不对..Class开头不应该是小写的吗？

Doing morning _____(exercise) is good for our health. Doing Morning exercises _____(are) good for us. lt's good for you _____ in the morning good morning Good morning Good morning good morning good morning good morning Good morning Good morning Good Morning Good Morning 歌词 good evering good morning, be good for的用法Morning exercises _____(be） good for us.Doing Morning exercises _____(are) good for us. _____(do) sports in the morning _____ (are) good for your health. 急找一首英文儿歌 good morning good morning doing morning _____(exercise)is good for you health里exercise怎么变 Doing morning exercise _____ our health.填什么?A:is good forB:is good toC:are good forD:are good to