If the Oxygen supply in the atmosphere was replenished by plants it would soon be exhausted .

Our primary goal is to teach students to discover the truth. But we have also other aims, such as providing them with knowledge or to teach to work consciously

After Allan had searched for twenty minutes, he realized that jacket had been laying on the table the ent time

As a child grows on, its physical health is affected by many elements the air, water and food.

All of the mammals, dolphins are undoubted among the friendl to human.

One reason birds have been so successful is because of their able to esca from danger quickly.

A turtle differs from all other reptiles in that its body is encased in protective Shell of their own.

The team leader demanded from his team members a serious attitude wtih work, good team spirit, and they work hard.

When the sun bear cubs are born , they are almost completely hairl, can’t bear, and blind

Some studies show that young babies prefer the smell of milk to those other liquids.

In the 1920s, Tulsa had a higher number of millionaire than other U.S. city

Mary and her sister just bought two new winters coats at the clea sale.

Migration of animals be initiated by physiological stimuli such reproductive changes, external pressures such as weather changes , or combination of either types of changes.

He  ............  on many subjects at the meeting.

When T.S. Eliot’s “The Wasteland” appeared in 1922, critics were divided as to good it was written

Find out error in each sentence: Our lifestyle changed since running water came to our village

This library book is overdue. I  ............ better return it today.

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

If drivers obeyed the speed limit , fewer ccidents occur .

Ethics is the branch of philosophy that deals with alues of life in a coherent, systematic, and science manner.

She promised that she would come, butfact she doesn’t