Since fireworks are dangerous , many countries have laws preventing business to sell them.

One of the students who are being considered for the scholarship are from this university.

To survive , most birds must eat at least half their own weigh in food every day

Jessamyn West’s first and most famous novel, the friendly persuasion, describes the life of the Quaker farmed family in the mid-1800’s.

Materials that of clay are among the most ancient manufactured articles and have played a vital role in human civilization.

Water , ice, and snow play a role in affecting an Earth’s rotation

Stars derive their energy from thermonuclear reactions that take place in their heat interiors

He was so careless that he left the work half doing and went to the cinema.

The cars in garage were badly in need of to be repaired.

Few people realize that the musician of the national anthem of the United States originally belonged to the British drinking song.

The campaign will hopefully ensure the survival ...... the tiger.

The most visible remind of the dose relationship between the United States and France is the famous Statue of Liberty, which stands in New York Harbor.

They asked us, Henry and I , whether we thought that the statics had been presented fairly and accurately.

In the 1800’s botanist Asa Gray worked to describe and classifying the plants found in North America.

In the 1970’s consumer activities succeeded in promoting laws that set safety standards for automobiles, children’s clothing, and a widely range of household products.

The biologist found some pollutants, a little of which can be considered very harmful to fish and other living organisms in the river.

The ozone layer must be protected because it shields the Earth from excessive ultraviolet radiations

It is becoming extremely difficult to grow enough to feed the world’s rapidly increased population.

The fragrant leaves of the laurel plant to sell commercially as bay leaves and are used for seasoning foods.

Exercising well is as important to your health as sleep and eating correctly

Mutualism is a relationship between animal species which in both benefit.