The 317.5km long Moscow Metro is the sixth longest subway system in the world. It is mostly underground, and serves the city of Moscow and the neighbouring towns Krasnogorsk and Reutov. State-owned enterprise Moskovsky Metropoliten owns and operates the metro system.
In prescriptive grammar, the topic sentence is the sentence in an expository paragraph which summarizes the main idea of that paragraph. It is usually the first sentence in a paragraph. Also known as a focus sentence, it encapsulates or organizes an entire paragraph. Although topic sentences may appear anywhere in a paragraph, in academic essays they often appear at the beginning. The topic sentence acts as a kind of summary, and offers the reader an insightful view of the writerâs main ideas for the following paragraph.
What is the function of topic sentences in an essay? To provide a focus for body paragraphs   .To support the thesis statement.   {apex}      Topic sentences let the reader get an idea of what you will be  â¦talking about. You need to clarify your idea without giving too  much away. Remember: A topic sentence can also be something called  a hook. A type of sentence to make readers want to read the rest  of your essay.     Topic sentences are related to paragraphs. They make a  statement and the rest of the paragraph explains or gives examples  of the topic sentence.    The thesis statement is related to the whole essay. The thesis  statement states the thesis or argument of the author in an  essay.