Choose coordinating conjunctions to comp l ete the f ollowing sent , Add a comma when necessary. 1.Everyone in our class gets along really well preparing for the group presentation was easy. 2.Kaori started to attend free classes at the Writing Center she had received poor grades on her essays in the first semester. 3.Wirat's economics professor is very easy-going during lectures he seems annoyed answering students' questions. 4.Essays can be submitted directly to my office _they can be emailed to me as a pdf file. 5.The cost of tuition living arrangements are significant actors when students decide where to attend university.