Isle Royal National Park in Lake Superior can only be reached by the boat.

The medical problems of parents and their children tend to be very similar to because of the heredit nature of many diseases

A film isn’t worth to watch, whatever its subject, unless it engages viewer’s mind and makes him think.

The tongue is the principle organing of taste, and is crucial for chewing, swallowed and speaking.

To receive (a degree from an American university, one must take many courses beside thos one’s major fiel

Usually the climate mountainous areas becomes much windy at higher altitude

Before she moved here, Arlane had been the president of the organization as since four years.

The modern American dictionary is typically a single compact volume published with modest price.

The athlete, together with his coach and relatives, are travelling to the Olymp Games.

The police officer lectured the children for ten minutes about the dangers to throw stones, then let them off with a warning.

Find the mistakes and correct

In  many areas of  world, people need clothing for protection the weather.

Gwendolyn Brooks, which won a Pulitzer Prize for Poetry in 1950, had 75 poems publishedthe time she was twenty

Every society changes, but not change at the same rate or in same direction 

The Egyptians first discovered that drying fruit preserved it, made it sweeter and improvement its flavor.

Half of the money … to Mr. Lam. 

Air pollution, together with littering, are causing many problems our large, industrial cities today.

Being the biggest expanse of brackish water in the world,  Baltic Sea is one of special interesting to scientists.

Generally speaking, magnitude 1.0 earthquake on the Richter scale is detected by instruments but not person 

Many people have stopped to smoke because they are afraid that it may be harmful their health.

Today’s nuclear fission fuels are the remnants of which used to be a much more tive mixture of radioactive and fissionable materials two billion years ago and earlier

The signing of the peace treaty was an event major importance.