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 sentence is a sentence whose main idea or claim controls the rest of the paragraph; the body of a paragraph explains, develops or supports with evidence the topic sentence's main idea or claim. The topic sentence is usually the first sentence of a paragraph, but not necessarily.