They exercise two hours a day.(对划线部分提问) _______ ________ do they exercise a day?划线部分是 two hours
问题描述:
They exercise two hours a day.(对划线部分提问) _______ ________ do they exercise a day?
划线部分是 two hours
答
How long他们每天锻炼多长时间
答
How long~
意思就是他们每天运动多久/多长时间~