Although most species of small birds gather in groups at feeders provided by bird-watchers, the bright red cardinals usually appears alone or with its mate.

The workers went on strikes because of they thought their wages were low.

Society uses such human emotions as proud, shame, guilt, and fear to maintain itself.

Although caffeine is a moderately habit-forming drug, coffee is not regarded as harmfully to the average healthy adult.

Mai and Lan have a row because they have misunderstood one another.

Education, whether it happens at school or anywhere else, is a important part in our life.

It is very difficult for her to prevent him for smoking in her house.

The chemistry instructor explained the experiment in such of a way that it was easily understood.

Collecting stamps, playing chess and to mount beautiful butterflies are derrick’s hobbies.

People are not allowed enter the park after midnight because of lack of security.

The Greek historian Herodotus reported that one hundred thousand men are employed for twenty years to build the Great Pyramid at Gizeh.

My father asked me where had I gone the night before.

Had I been interested in that subject, I would try to learn more about it.

Mother’s Day is the day when children show their love on their mother on.

When a patient's blood pressure is much higher than it should be, a doctor usually insists that he will not smoke.

Each of the members of the group were made to write a report every week.

Dinosaurs became extinct millions of years ago because of the earth's climate changed drastically.

Women nowadays have more free to participate in social activities.

There are many reasons why a particular species may become endangering.

The master of ceremonies announced in a loud and clear voice and told that the dinner would be late due to unforseen circumstances.

Unlike the old one, this new copier can perform their functions in half the time.