When a pearl is cut in half and examined under microscope, but its layers can be seen.

The refugees are much upset because they have been deprived from their homeland and their families

Astronomers do not know how many galaxies there are, but it is thought that there is millions or billions.

Desert shrubs have tiny leaves that lost little moisture a hot day.

Alike other forms of energy, natural gas may be used to heat homes, cook food, and even run automobiles

He never tells a lie, ________?

The rock formations in the Valley of Fire Nevada has been worninto many strange shapes by the action of wind and water.

The Texas Panhandle region, in the Northwestern part of the state, produces more wheat, cotton, and grain sorghum than any of area of Texas

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

Tom didn’t believe in us, and it took along time to convince him.

I was tired. If I ____________ some food, I _____________ hungry.

Deciduous trees are ones that lose its leaves in the autumn and grow new ones in spring.

Everyone who has traveled across the United States by car, train, or bus are surprised to see such a large expanse of territory with such variation among the lifestyles of the people.

Nobody bothered with telling me that the school had decided to have a special holiday on Friday

They wrote letters to each other. It could take days or even weeks for letters to be ......……

Bells told people of happy vents, such weddings and born or, sometimes had to announce unpleasant events such as a deat

It is  nearly perfect crystal structure that gives diamonds their hardness, brilliance, and transparent

In its pure State, aluminum is a weak metal, but when combined elements such as copper or magnesium, it is formed alloys of great strength

A ………. is an enormous system of stars in outer space.

From 1785 to 1990, the capital of the U.S is located in New York.

Basic elements of public-opinion research are interviewers, questionnaires, tabulating equipment, and to sample population.