正确看答句我写的对不、。。how often do you exercise？Less than three times a week.how often do you do exercise第一个do是助动词，第二个do与exercise组合表示做锻炼答句呢？答得上来么？答得正确，刚我解释的不对，你那样问也可以，exercise可以做动词，及物或不及物都可以表示运动，锻炼this article says ______（smoke）is bad for our lung。肿么做啊smoking