1. This is…这是…（用于介绍人或物） 2. look after=take care of照料，保管
3. make friends with…与……交朋友
4. introduce oneself to each other相互间进行自我介绍introduce A to
5.welcome to + n. 欢迎到……来
6.be clever at (be good at = do well in) 在……方面聪明（在……很擅长）
7.in the school basketball team在校篮球队
