Question

【题目】—How often do the students play sports?
— .
A.Since last night
B.For two hours
C.A month ago
D.Once a day

Answer 1

【答案】D
【解析】句意：—学生们多久做一次运动？—一天一次。Since last night自从昨天晚上；for two hours两个小时，a month ago一个月前；once a day一天一次；根据how often可知此处表示频率，故选D。