英语怎么说?I began to participate in biology,physics and chemistr

英语翻译I was nervous to participate in the conference and to ma I went to collage in?and began to work in 英语改错,急求帮忙 ：I greeted to them in English and then began to ch youareinvited to participate in I was born in 2000 and I come from England .I began to learn 英语填空 I'm going to work hard ( ) physics this term A.in B.at I greeted to them in English and then we began to chat.改错题（也 I went to college inthe 1980s and began to work in my twenti I hate to not participate in your past I'm sorry to keep you 翻译:I think she is going to do ( )in physics. I have no enough time to participate in the end .I will acco I must participate in your future