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 paragraph with unity develops one, and only one, key controlling idea, to ensure unity, edit out any stray ideas that donât belong and fight the urge to take interesting but irrelevant side trips; they only create confusion about your destination. 4.1.2 The Topic Sentence. The topic sentence states the main idea of the paragraph. Think of the topic sentence as a rallying point, with all supporting sentences developing the idea it expresses. A good topic sentence helps you gauge what information belongs in a paragraph, thus ensuring unity.