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 generally appears early in a body paragraph (often the 1st or 2nd sentence) and controls the paragraph. A topic sentence is like a mini thesis sentence for each paragraph and serves to unify the contents of the paragraph. Everything that follows in the paragraph needs to relate to the topic sentence.