The Midwest is defined differently by different dictionaries. Perhaps the most accepted definition is: the area between the Appalachian Mountains on the east and the Rocky Mountains on the west and north of the Ohio and Missouri Rivers.
Americans also speak of the Southwest, which includes particularly Arizona, New Mexico, and Western Texas.
The Northwest is clearly the states of Washington and Oregon. The state of California is often referred to as the West Coast.
Questions 26 to 28 are based on the passage you have just heard.
26What do citizens of Alaska call the rest of the mainland part of the country?
27.Which section of the country is New England?
28.Which state is not included in the Southwest?
Passage Two
Most people picture sharks as huge, powerful, frightening predators, ready at any moment to use their sharp teeth to attack unwary swimmers for no reason. This idea of sharks, however, contains many misconceptions.
First, there are about 350 species of shark, and not all of them are large. They range in size from the dwarf shark, which can be only 6 inches long and can be held in the palm of the hand, to the whale shark, which can be more than 55 feet long.
A second misconception concerns the number and type of teeth, which can vary tremendously among the different species of shark. A shark can have from one to seven sets of teeth at the same time, and some types of sharks can have several hundred teeth in each jaw. It is true that the fierce and predatory species do possess extremely sharp and brutal teeth used to rip their prey apart. Many other types of sharks, however, have teeth more adapted for grabbing and holding than for cutting and slashing.
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