During the class you'd better take some notes while you are listening to the teacher.
课堂上,听老师讲课的同时最好还是记一下（笔记）.
How smart you are!The problem is difficult,but you worked it out.
你真（聪明）呀!这么难的题目你都做出来了.
Tina is funny and Tara is even funnierthan her.
Tina很有趣,Tara比她（更有意思）.