[单项选择]Once there is a threat to our water supply water can quickly become the only thing that matters.（）
A. 只有水源受到威胁，水很快就会变成唯一重要的物质。
B. 供水一度出现危机，所以水很快就成了唯一紧缺的物质。
C. 供水一旦受到威胁，水很快就会成为唯一至关重要的问题。
D. 有一次水源曾遭受污染，水成了人们唯一不能很快解决的问题。

[单项选择]Air and water pollution are our Number One priorities regarding the current and future state of the environment．
A. 有关环境的现状和未来，空气和水污染是我们关注的首要问题。
B. 未来和现在的水污染和空气污染状况是我们关注的首要问题。
C. 由于空气和水污染，未来和现在的环境成了我们关注的首要问题。
D. 空气污染和水污染是未来和现在环境的头号杀手。

[单项选择]Seen from space, our earth, with water covering 70% of its surface, appears as a “blue planet”.（）
A. 如果从太空中看地球的话，地球像一个蓝色的行星，而且地球的表面70%都是水。
B. 地球表面的70%都被水覆盖着，从太空中看地球，它就像一颗蓝色的行星。
C. 从太空上看我们的地球，它表面的70%都被水覆盖着，看上去像一颗蓝色的行星。
D. 从太空中看到地球的表面的70%都是水，它是一个蓝色的行星。

[填空题]One of our water pipes has burst. We must send _____ the plumber.

[填空题](see) （　）from space, our earth, with water covering 70% of its surface, appears as a "blue planet".

[单项选择]______ from space, our earth, with water covering 70% of its surface, appears as a "blue planet".
A. See
B. Seeing
C. Seen
D. To be seen

[填空题]A. evaporation
B. water cycle
C. Complicated process
D. ever-going-on process
E. rainfall
F. ground water
G. vapor
H. transpiration
I. high land
J. formation of clouds
K. formation of rain
L. cold air
M. drops of rain
N. absorbed by soil
O. porous rock layer
P. non-porous rock layer
Q. accumulation of water
R. process of water cycle

被土壤吸收( ) 雨 滴( )

[填空题]The date of our______(arrive)is postponed once again for the thunderstorm has blocked the air traffic since Wednesday．

[简答题]

Psychologists once believed that the motive that caused men to strive to attain high-level managerial positions was the "need for achievement". But now they believe it is the "need for power".
Power seekers strive hard to reach positions where they can exercise authority over large numbers of people. (46) Individual performers who lack this drive are not likely to advance far up the managerial ladder. They usually scorn company politics and devote their energies to other types of activities. The power game is part of management, and it is played best by those who enjoy it most.
(47) One of the least rational acts of business organizations is that of hiring managers who have a high need to exercise authority, and then teaching them that authoritative methods are wrong and that they should be consultative or participative. (48) It is a serious mistake to teach managers that they should adopt styles that are inconsistent with thei