The northern parts of the United States get very cold in the winter. It snows a great deal and the temperature often goes (21) zero degree in January, (22) and March. But the northeastern and northcentral regions of (23) have been financial and industrial centers, and they are heavily polluted.
In recent years, people in these regions have begun to take vacations (24) these cold winter months. They go to southern parts of the country (25) it is warmer. Many go to Florida where the weather is (26) . Others go to the western states of Arizona, New Mexico and Texas where they (27) dry desert climates.
I has become (28) nowadays for old people to move south to these places (29) they retire. Typically these people sell their houses in their home communities and move south to begin a new life (30) senior citizens.
Their children likely have homes (31) and many of th
A. typical
B. usual
C. tropical
D. practical
The northern parts of the United States get very cold in the winter. It snows a great deal and the temperature often goes (21) zero degree in January, (22) and March. But the northeastern and northcentral regions of (23) have been financial and industrial centers, and they are heavily polluted.
In recent years, people in these regions have begun to take vacations (24) these cold winter months. They go to southern parts of the country (25) it is warmer. Many go to Florida where the weather is (26) . Others go to the western states of Arizona, New Mexico and Texas where they (27) dry desert climates.
I has become (28) nowadays for old people to move south to these places (29) they retire. Typically these people sell their houses in their home communities and move south to begin a new life (30) senior citizens.
Their children likely have homes (31) and many of th
A. below
B. above
C. near
D. over
The price system in the United States is very complex. It is composed of the prices of all the products bought and sold in the economy as well as those of a lot of services, including labor and transportation. The interrelationships (相互关系) of all these prices make up the "system" of prices. The price of any particular product or service is linked to a broad, complicated system of prices in which everything seems to depend more or less upon everything else.
If one asks a group of people what price is, many would reply that price is an amount of money paid by the buyer to the seller of a product or service. For a complete understanding of a price in any particular transaction, much more than the amount of money involved must be known. Both the buyer and the seller should be familiar with not only the money amount, but with the quantity and quality of the product or service to be exchanged. Besides, they should also know the time and place at which the exchange wil
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