问题补充：
--- I think students should have mobile phones to call their parents.
--- . They often use them to play games and chat with friends instead
A. I hope so
B. I don’t agree
C. No problem
D. Good idea
答案：
A. I hope so
(答案→)B. I don’t agree
C. No problem
D. Good idea
解析：句意：——我认为学生们应该有手机去给他们的父母亲打电话。——我不同意。他们反倒经常使用它们玩游戏并且和朋友们闲聊。A. I hope so 我希望如此； B. I don’t agree我不同意；C. No problem没问题；D. Good idea好主意，根据答语可知选择B。
