Mr.wang is to give us a talk on ( )he saw and heard in Brita

comrade Wang is to give us to talk on ()he saw and heard in Mr.wang will give us a talk __the history A:on B:in C:at D:t 空 farmer and 空 artist is going to give us a talk in the meet mr.zhang is to give us a report on ()in Korea. Professor Wang ( )to give us a talk next wee mr smith is going to give us a talk-----.A.at this afternoon I hear Mr black is coming to give us a talk _. Mr Smith is going to give us a talk ___ the study of English I hear Mr.Smith is coming to give us a talk ______. I hear Mr.Smith is coming to give us a talk ____________ He will give us a talk ( on how to)study English well. 说明理由为 writer and teacher _____going to give us a talk.A.is B.are