[单项选择]______ trees are cut down in the forests every year.


A. Thousands
B. Thousands of
C. Thousand of

[单项选择]______ trees are cut down in the forests every year.


A. Thousands
B. Thousands of
C. Thousand of

[单项选择]It can be inferred from the passage that every year there are most probably more than ______ entering the U. S.


A. 800,000 immigrants
B. 550,000 immigrants
C. 480,000 immigrants
D. 300,000 immigrants

[单项选择]Why did people cut down trees


A. For advantage.
B. For benefit.
C. For house.
D. For business.

[单项选择]He told his caretaker to cut down the tree.

[单项选择]The purpose of a（）is to cut down imports in order to protect domestic industry and workers from foreign competition.
A. tax
B. toll
C. fee
D. tariff

[单项选择]The purpose of a （） is to cut down imports in order to protect domestic industry and workers from foreign competition.
A. tax
B. toll
C. fee
D. tariff

[单项选择]The purpose of a ______ is to cut down imports in order to protect domestic industry and workers from foreign competition.
A. tax
B. toll
C. fee
D. tariff

[单项选择]Some trees are cut down each year and ______ are left to grow even taller.
A. the rest
B. a rest
C. rest of them
D. a rest of them

[单项选择]Riga Electronics Limited staff who come to its yearly summer picnic ______ have exciting times with their fellow employees.
A. invariably
B. inversely
C. directionally
D. profitably

[单项选择]Commercial companies（）millions of dollars each year for the government.
A. take away
B. bring in
C. bring out
D. lose

[单项选择]

Passage Four
Increasingly, over the past ten years, people -- especially young people have become aware of the need to change their eating habits, because much of the food they eat, particularly processed food, is not good for the health. Consequently, there has been a growing interest in natural foods: foods which do not contain chemical additives and which have not been affected by chemical fertilizers, widely used in farming today.
Natural foods, for example, are vegetables, fruit and grain which have been grown in soil that is rich in organic matter. In simple terms, this means that the soil has been nourished by unused vegetable matter, which provides it with essential vitamins and minerals. This in itself is a natural process compared with the use of chemicals and fertilizers, the main purpose of which is to increase the amount-- but not the quality -- of foods grown in commercial farming areas.
Natural foods also include animals which have be
A. natural foods
B. eating habits
C. healthy eating
D. food problems