do morning exercises的exercises必须加s吗exercises是在这里可数名词.那可不可以不加s,为什么?

do morning exercises意思 do morning exercises是什么意思? do morning exercises.怎么读? 怎么读Do morning exercises do morning exercises怎样读 do morning exercises的读音 do morning exercises中文是什么? do morning exercises everyday改错 英语do morning exercises单词怎么读 do morning exercises怎么读语音 do morning exercises 的音标是什么? do morning exercises的中文意思 we do morning exercises什么意思 ( )you do morning exercises every day? Usually we do morning exercises first对do morning exercises 提问 Every morning he()A.do morning exercises B.play football exercise什么时候加sdo morning exercise还是do morning exercises Do morning exercises in the morning(改为反意疑问句）Do morning exercises in the morning,＿