how引导的疑问句
问健康状况 ________are you
问数量 _______peopie are there in your class
问价格 _______ is the meat
问次数 _______ have you been to beijing
问频率 _______ do you clean your room
问时段 _______ has he lived there
问多久以后 _______ will he be back
问方式 _______did you come here