Bacteria lived in the soil play a vital role in recycling the Carbon and Nitrogen needed by plants.

Most Polar seals retreat to open water during the winter, but a few types have learn to survive on and under the ice all year round.

I put my new book of zoology here on the desk a few minutes ago, but I cannot seem to find it.

The Department of Foreign Languages are not located in the new building opposite the old one.

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.

Men and women in the Peace Coips work with people in developing countries to help them improving the living conditions

Many hundred years ago, there were many villages and little towns in England

Running along the 180th meridian, the International Date Line is separated one day from another

S. Eliot received wide recognition after publishes The Waste Land, which fused poetic traditions with elements of modern music and language.

In pools, goldfish are not just ornamental; since they feed on mosquito larva, they are also benefit.

If one has a special medical condition such as diabetes, epilepsy, or allergy, it is advisable that they carry some kind of identification in order to avoid being given improper medication in an emergency.

Many small islands in the Indian Ocean are threatened by raising sea levels.

Yogurt contains a higher percentage of lactic acid than another fermented milks, and it is rich in B-complex vitamins.

Although he was happily married, he preferred spending lately hours at work to spending evenings lately at home

The most substances expand in volume when they are heated

One inventor that Thomas Edison can take credit for is the light bulb.

“Did you invest that company, Carol?” “Yes, but now I wish I ____”. 

From archeological evidences, we know that Egyptians were highly organized and civilized. Moreover, they were skillful in using crafts.

Rainwater carries unused chemicals from fields into streams or lakes, where various compounds promote the rate growing of weeds

The panda's ...... habitat is the bamboo forest.

Gunpowder, in some ways the most effective of all the explosive materials, were a mixture of potassium nitrate, charcoal, and sulfur