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Walking and swimming are the two most popular sporting activities undertaken by men and women.

When she retires in September 1989, tennis champion Christine Evert was the most famous woman athlete in the United States.

Geography is a very interesting subject; _______ very few people study it thoroughly.

It is believed that the more frequent you exercise, the greater physical endurance you will have

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In Britain, the most common leisure activities are home-based.

The artist tried stimulate interest in painting by taking his students to the museums.

The Homestead Act of 1862 granted 160 acres of land for any settler who would spend five years on the land.

Some bacteria are extremely harmful, but anothers are regularly used in producing cheeses, crackers, and many other foods.

Many people have stopped to smoke because they are afraid that it may be harmful to their health.

Dinosaurs are traditionally classified as cold-blooded reptiles, but recent evidence based on eating habits, posture, and skeletal structural suggests some may have been warm-blooded

They are known that colds can be avoided by eating the right kind of food and taking exercise regularly.

Mark heard the news on the radio_______ he was driving home.

The bodies of cold-blooded animals have the same temperature their surroundings, but those of warm-blooded animals do not.

The National Basketball Association will not let any athlete to continue playing in league unless he submits voluntarily to treatment for drug addiction.

The woman of whom red car is parked in front of the bank is a famous popstar 

All of the students_______ the seniors will receive their grades in two weeks.

She finds the work she has to do quite easily; boredom is her biggest problem

Muscles are essentially made up by elastic fibers that lend flexibility to the body.

Georgia has too many types of soil that virtually any temperate-zone crop can be grown there.

Woody Guthrie wrote thousands of songs during the lifetime, many of which became classic folk songs .

He is very clever and wins all the prizes _______ his brother never seems to know a thing.