OUR WORLD
One billion
Do you and your parents change mobile phones often? What do you do with your old phones?
Nearly everyone has a mobile phone today. And with the fast development of technology, people change their phones more often.
- 对本期电子报订户、有效期内的VIP教师会员和本学期初二尊享卡用户,我们开放所有内容:
- 如果您拥有以上权限,请点这里登录;
- 订阅电子报,请点这里;
- 激活VIP教师卡,请点这里;
- 激活21英语尊享卡,请点这里。