SAT English Practice Question

The main idea of a paragraph is often stated in a topic sentence, which is usually found at the beginning of the paragraph. Topic sentences are often followed by supporting sentences that explain, illustrate, or provide evidence for the main idea. What is the purpose of a topic sentence?

1. A.conclude the paragraph with a clear summary of the main idea.
2. B.create a sense of suspense or mystery for the reader.
3. C.introduce the main idea that will be developed in the paragraph.
4. D.provide a personal anecdote or example to illustrate the main idea.