Is Dr. Wang ______ today-No, He is busy prearing for an operation.

My father used to _________ up late, but now he is used to _________ up early.

Fresh air is good ____ your health

May I stop here? — No, you _____.

依次填入下面一段文字横线处的语句，衔接最恰当的一组是（ ）十月底了，_______，_______，________，________，_________，_________，好像背着火炉在走。①蜿蜒起伏的石阶宛如大海抛出的一条长长的浪花，在山中明亮地闪烁着②而石阶暴露在草木稀疏的向阳山坡上时③香港的太阳仍然火辣辣的④能缓释行山时的疲劳⑤遇到林木茂盛的地方，就有难得的阴凉⑥脊背就有被灼伤的感觉