how do you use " in , on , at " ? who can help me? I am setting in/on the bus . I am on the street . I am in the office . we will meet at the staion who can help me ???

How to use ' then , that , this , these , those ?? whose can tell me how to use " then , that , this , these , those ??

My best friend and I My best friend is Qingqing. Many people said we are looks like twins,but we are not sister and sister. We have the same hobbies .We likes reading,music,learn and drawing . We both have long hair,thin,dark skin and same high tall. But I think she is better-looking than me. I'm more outgoing than she . We love to go shopping and wear the same style clothes. We help each other.She is good.I hope that our friendship forever.

Self Introduction My name is Issy He.my friends call me Issy.I am twenty-five years old.I come from China.There are two people in my family.my mother and I.We are not rich,but we are a happy family.

Hello everyone Nice to meet you I come from China I would like to improve my English and French I can help you to learn chinese if you like then if you were interested, please contact me! thanks for reading, Issy