This list of countries by rail transport network size based on International Union of Railways data ranks countries by length of rail lines worked at end of year updated with other reliable sources. These figures also include urban/suburban mass-transport systems; as well as lines which are not used for passenger services. 1 List.
Review with students what a topic sen-. tence is. (The topic sentence is the sentence. containing the main idea of a paragraph-. often, but not always, the first sentence in. the paragraph.) Put a couple of good models. from the daily newspaper on the overhead-.
A topic is a particular issue or idea that serves as the subject of a paragraph, essay, report, or speech. The primary topic of a paragraph may be expressed in a topic sentence. The main topic of an essay, report, or speech may be expressed in a thesis sentence. An essay topic, say Kirszner and Mandell, should be narrow enough so that you can write about it within your page limit.