The following topic sentences are only examples. Your sentences may be different.

　　1. This is a strong topic sentence.

　　2. This is a weak topic sentence because the rest of the paragraph

　　describes what the writer does when he or she goes to the beach. A better topic sentence would be: “Whenever I have the opportunity to go to the beach, I always follow the same routine.”

　　3. This is a weak topic sentence because the rest of the paragraph describes the various ways students can get to class. A better topic sentence would be: “For the many students who cannot afford a car, there are several alternative ways of getting to class.”

　　Exercise W3

　　These are only examples. Your topic sentences may be different.

　　1. A dormitory room is cold and impersonal until several changes have been made to make it more inviting.

　　2. American telephone books are divided into several sections.

　　3. The fast-food restaurant has become popular for various reasons.

　　Exercise W4

　　1. D 2. B 3. D 4. A 5. C

　　Exercise W5

　　1. Students who need extra money can hold down a fulltime temporary job during their summer vacation.

　　2. A person can also meet other people by going to parties.

　　3. In my opinion, people should write clearly.

　　Note: The possible correct answers for Exercises W6-W7 are so varied that you might wish to discuss your answers with a fluent English speaker.