Question

activity 3 | recognizing effective topic sentences
read each of the following sets of sentences. write the topic and check (✓) the best topic sentence.

1. topic:

a. the air conditioner is one of the most useful inventions of the 20th century.
b. large air conditioners can be very expensive.
c. portable air conditioners can be easily moved from room to room.

1. topic:

a. jobs in biomedical engineering do not pay as much as those in electrical engineering.
b. biomedical engineering is a fast - growing industry.
c. biomedical engineers invent prosthetic devices for people with disabilities.

1. topic:

a. snowboarding is a winter sport.
b. few people know the interesting history of snowboarding.
c. snowboards are made of fiberglass and have sharp metal edges.
controlling ideas
the controlling idea in a topic sentence guides the paragraph and lets the reader know what the paragraph is going to be about. the topic of the paragraph is limited by the controlling idea—it narrows the topic.
here are some examples of topic sentences. the topics are boldfaced, and the controlling ideas are underlined.

1. e - books are easier to use than print books.

the reader expects to learn what makes e - books easier to use.

1. singapore is a very popular vacation destination.

the reader expects to learn some reasons why singapore is a popular vacation destination.

1. there are three things to be aware of before swimming in the ocean.

the reader expects to learn about the three things to know before swimming in the ocean.

Explanation:

1. Le sujet est les climatiseurs. La meilleure phrase - sujet est "The air conditioner is one of the most useful inventions of the 20th century" car elle est la plus générale et peut englober les autres informations sur les climatiseurs.
2. Le sujet est le génie biomédical. La meilleure phrase - sujet est "Biomedical engineering is a fast - growing industry" car elle est suffisamment large pour inclure les autres idées sur le domaine.
3. Le sujet est le snowboard. La meilleure phrase - sujet est "Snowboarding is a winter sport" car elle est la plus générale et peut servir de base pour les autres informations sur le snowboard.

Answer:

1. Topic: Air conditioners

• a. The air conditioner is one of the most useful inventions of the 20th century. (✓)
• b. Large air conditioners can be very expensive.
• c. Portable air conditioners can be easily moved from room to room.

1. Topic: Biomedical engineering

• a. Jobs in biomedical engineering do not pay as much as those in electrical engineering.
• b. Biomedical engineering is a fast - growing industry. (✓)
• c. Biomedical engineers invent prosthetic devices for people with disabilities.

1. Topic: Snowboarding

• a. Snowboarding is a winter sport. (✓)
• b. Few people know the interesting history of snowboarding.
• c. Snowboards are made of fiberglass and have sharp metal edges.