[单项选择]According to the passage, any vacation from thinking should be taken ______ .
A. several times throughout the year
B. during the winter
C. during the summer
D. as seldom as possible

[单项选择]According to the passage, any vacations from thinking should be taken ______.
A. several times throughout the year
B. during spring and fall
C. during the summer
D. as seldom as possible

[单项选择]Where might this passage come from

[单项选择]

Passage Five
From the beginning rivers have played an important part in the life of man. Man of the earliest times used the rivers as a means of travel. Today rivers still serve as a great waterway for the transport and people.
In ancient times, man settled near rivers or on river banks and built up large empires.
Water is Nature’s most precious gift to man. Man needs water to irrigate his crops, to cook and to wash. In nations all over the world rivers mean life and wealth. They feed and clothe the nations around them.
Water is also a source of energy and power. Man constructs huge dams across the river to control the water for irrigation and get the energy needed to drive generators. The electrical power is then directed to homes, cities, factories and television stations.
Man uses water each day. His main source of water comes from reservoirs, which in turn get their water from the rivers.
Rivers also bring down soil
A. deltas
B. crops
C. fresh water life
D. soil and minerals

[单项选择]It can be inferred from the passage that from a historical perspective, the European conquest of the Americas can be viewed as
A. (A) most similar to earlier successful conquests
B. (B) most different from earlier failed conquests
C. (C) most dissimilar to earlier successful conquests
D. (D) most analogous to earlier failed conquests
E. (E) unlike any earlier conquests in history, successful or not

[单项选择]Can you guess where this passage is from

[单项选择]The main danger discussed in the passage is from ______.
A. students making their own atomic bombs.
B. foreign spies stealing secrets
C. terrorists stealing plutonium and making their own bombs
D. technicians stealing plutonium

[单项选择]This passage is from a piece of ______.


A. work report
B. official document
C. news report
D. advertisement

[单项选择]The passage tells us that any new knowledge will have a powerful influence on ordinary people if______.


A. it is simple and understandable
B. it is advocated by eminent persons
C. it has been put into practice and proven true
D. it has something to do with their immediate concerns

[单项选择]The passage suggests that as any individual home is just a fragment of a huge communal picture when you paint your house______.
A. you should have your own unique way so as to avoid repetition
B. you should take into account the fading of colors
C. you should take general appearance of the area into consideration
D. you should keep your house in harmony with what have already been painted in the picture

[单项选择]Where might the passage be taken from
A. A novel.
B. A short play.
C. A play.
D. A book of facts.

[单项选择]The passage is most probably from
A. a review of a book on cowboys.
B. a study of cowboy work culture.
C. a novel about cowboy life and culture.
D. a school textbook on the cowboy history.