Though he did not develop language, Laurent Clerc brought it on America from France.

It is the large city in Europe with a population of  eight million.

For many years, people have wondered that life exit elsewhere in universe.

Indiscriminately dumping waste material and inadequate sewage treatment are two serious causes of environmental pollution

The girls were sorry to had missed the signers when they arrived at airport.

The discovery of the antibiotic penicillin in 1928 has not produced antibiotics useful for treatment of infectious diseases until 1940.

The native people of Americans are called Indians because when Columbus landed in Bahamas in 1492, he thought that he has reached the East Indies

Instead of staying around the house all day, you should be out there looking ............... a job.

Never before has so many people in the United States been interested in soccer.

The surface conditions on Mars are the more similar with the Earth’s than those of nay other plane in solar system.

The average salt content of seawater is more three percents .

Even the most discriminating gourmet will agree that food in the south is as good as any other regions in country.

As a young man, Darwin showed little promising as a biologist.

Without alphabetical order, dictionaries would be impossibility to use

He has less friends in his class now than he had last year

Peasant’s wife, who have been married for four times, has just had her third baby.

Please sendinformation with regard of insurance policies available from your company.

I was such nervous that I didn’t think I would pass exam.

Not one in one hundred children exposed to the disease are likely to develop symptoms it.

It _________Lan who always helps him in his trouble.

Because of it consists only of relatively short strand of DNA protected by a shell of Protein, a virus cannot eat or reproduce by it self.