The continuous hazy(雾霾) weather in China has been affecting many people lately. We shouldn’t _____ in order to stay away from its harm. ①open the window to let outdoor mist(雾气) get into the room ②wash our hands after coming back home from work or school ③do morning exercises outside as often as possible ④get out of houses without wearing masks (口罩) ⑤pay more attention to eating healthily A.①③④ B.①④⑤ C.②③⑤