Nobody knows the origin of the Vietnamese long dress. There was no evidence about where and when it appeared.

With respect to maneuverability, few birds can equal the capabilities of the hummingbird, which hovers for long periods and even flies backward.

Scientists warn of the impending extinction of many species of plants and animals.

As tourism is more developed, people worry about the damage to the flora and fauna of the island.

When being interviewed, you should concentrate on what the interviewer is saying or asking you.

He insisted on listening to the entire story.

Childbearing is the women's most wonderful role.

Peter didn’t mean to be disrespectful to his teacher. He just couldn’t control his temper.

Primary education in the United States is compulsory

An Alzheimer patient’s incomprehensible ramblings will frequently upset family members, who may take the statements personally.

Reaching 35 and obviously aging, Jane has to make up her mind on her future very soon.

The first few days at university can be very daunting, but with determination and positive attitude, freshmen will soon fit in with the new environment.

If petrol price go up any more, I shall have to use a bicycle.

Though many scientific breakthroughs have resulted from mishaps, it has taken brilliant thinkers to recognize their potential.

The copperhead, a snake that strikes without warning, is considered more dangerous than the rattlesnake.

The whole village was wiped out in the bombing raids.

My parents’ warnings didn’t deter me from choosing the job of my dreams.

The fer-de-lance, a kind of viper, is one of the most poisonous snakes.

A brief outlined of the course and bibliography were handed out to the students at the first meeting.

In daily communication, you should know how to interpret other people’s body language.

In the 1960's the upper level of Pennsylvania Station in New York City was torn down and replaced by Madison Square Garden.