![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
1 preview : watch the vedio and while you'r watching , remember to take down some notes. then answer the question: what will we mailnly focus on in unit 1? try to give as much detailed information as you can . you can type answers in the answering part or just take photos of the notes then upload the pic as attachment附件.