So teacher I just  finished my test on the grammar, I think is unit is hard and difficult, Some stuff that I don't really know what is that mean and hard. So I got some question that I don't really  understand.  So these are the question that I want to ask you. So they want you to click on the sentence that uses abbreviations appropriately.  ( 1. Ex:  My sociology professor spends most of his lecture time talking about political science. 2. Ex:  My soc. prof. spends most of his lecture time talking about political science. So I don't really  understand the meaning. I need help on this unit grammar.