The developing of the submarine was hindered by the lack of a power source that could propel an underwater vessel.

The teacher asked him why hadn’t he done his homework, but he said nothing.

To everyone's surprise, it wasn't in Bristol which he made his fortune, although that’s where he was born.

The Games' organizers faced significant bed shortages because the record number of more than 13,000 athletes and officials who attended the 2006 Games

He has made a lot of mistakes in his writing because his carelessness.

Sex's education is instituted to help the student understandthe process of maturation, to eliminate anxieties related to development, to learn values, and to prevent disease.

Doctors believe there is better in this modern world of ours to try to prevent illnesses than to rely on medicines to cure them.

I enjoy reading the article that you told me about it yesterday.

Higher education in the United States specifically refers to post -secondary institutions, that offer associate degrees, master degrees or Ph.d. degrees or equivalents.

The puppy stood up slowly, wagged its tail, blinking its eyes, and barked.

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

Despite America’s affluence, many people are without jobs, on welfare, and have a lot of debts.

There is a severe famine in Somalia, and thousands of people are dying from hunger.

The big problem was that we really did not understand what was happened

If the goal keeper had playing better, they would not have lost the game.

It is important that you turned off the heater every morning before you leave for class.

The most visible remind of the close relationship between the United States and France is the famous Statue of Liberty, which stands in New York habor.

I think she will be suitable for the work because she has been working like a teacher for a long time.

The children next door are a real nuisance. Their football is always coming on the fence and damaging the flowers in my garden.

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

More than ten students have failed the exam, that surprised the class teacher.