10.20
1，Characteristics of friends
2，What will you do to relaxyourself? indoor or outdoor activities
3、the colleage is going to abandon its child tutoring program, for the reason that less students and childs are participate in the program.the woman disagree with that idea.地点搬到town交通不方便，自己business专业有志于做教师。

4、coevolution,讲了ant 和anacia plant的coevolution

5、女生报不上某教授的课，男生建议她第一节课去，看有没有人退或者换教授。

6、两种记忆 declarative memory和procedural memory，第一种knowing sth，譬如知道美国首都华盛顿,，第2种是hopw to do sth，比如自行车 知道部件,还知道部件的用途.最后说distingction of these two很重要，聘请一个曾经的队员做教练很好。