Fun Time
Brain games
Which of A,B,C,and D, should replace the question mark?
Answer:
A (1 is added to 2 to equal 3; 4 is added to 5 to equal 6, but similar symbols disappear.)
- 对本期电子报订户、有效期内的VIP教师会员和本学期高一尊享卡用户，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。
