Topic 1:
hello, my name is..., im from...
i like...(or don't like).
i usually do .... in my free time. nice to meet you, thanks.
Topic 2 : today, more and more schools are polluted by some kinds of emissions in life. So, to reduce the pollution at my school, we should plant a lot of trees to filter the emissions to help our school have a fresh air envirroment