简答题Topic sentence is so called because it tells the reader about what topic is discussed in a paragraph.简答题The topic sentence is a general statement that states the main point of a paragraph.简答题The most important sentence in a paragraph is the concluding sentence.简答题The two sections of a topic sentence are: Topic and Controlling Idea.简答题The topic sentence tells the reader about the main idea of the paragraph itself and it is usually the first sentence in a paragraph.