How can school ban mobile phones completely some of the parents simply don’t fol
来源：网络
时间：
推荐文章
How can school ban mobile phones completely __________ some of the parents simply don’t follow the rule?
A. unless????????????? ????????????? ????????????? B. when????????????? ????????????? ????????????? ????????????? C. until????????????? ????????????? ????????????? ????????????? D. before
试题答案
【答案】
B
【解析】
试题