[单项选择]Now it is important that our drinking water ______ purified.
A. should be
B. is
C. will be
D. was

[单项选择]Now it is important that our drinking water ______ purified.
A. should be
B. is
C. will be
D. was

[单项选择]Dirty water must not be ______ with drinking water.
A. joined
B. linked
C. mixed
D. combined

[单项选择]Doctors say drinking water will help the pain ______ after the body has the right amounts of water and salt.
A. disappear
B. disappearing
C. disappeared
D. disappears

[单项选择]Drinking water ________ excessive amounts of fluorides may leave a stained or mottled effect on the enamel of teeth.
A. containing
B. in which containing
C. contains
D. that contain

[单项选择]The ______ of seawater into drinking water is a complicated problem.
A. conversion
B. conjecture
C. concession
D. contraction

[单项选择]Our manager is ______ an important customer now and he will be back this afternoon.
A. calling on
B. calling in
C. calling up
D. calling for

[单项选择]Our manager is ________ an important customer now and he will be back this afternoon.
A. calling on
B. calling in
C. calling up
D. calling for

[单项选择]We have done all we could and now our cherished project is at the mercy of our new CEO.
A. under the guidance of
B. in the power of
C. on the verge of
D. on the agenda of

[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]

Friends play an important part in our lives, and although we may take the friendship for granted, we often don’t clearly understand how we make friends. While we get on well with a number of people, we are usually friends with only a very few — for example, the average among students is about 6 per person. In all the cases of friendly relationships, two people like one another and enjoy being together, but beyond that, the degree of intimacy between them and the reasons for their shared interest vary enormously. As we get to know people we take into account things like age, race, economic condition, social position, and intelligence. Although these factors are not of prime importance, it is more difficult to get on with people when there is a marked difference in age and background.
Some friendly relationships can be kept on argument and discussion, but it is usual for close friends to have similar ideas and beliefs, to have attitudes and interests in common &
A. all those who get on well with each other are friends
B. every student has 6 friends
C. everyone understands clearly how to make friends
D. friends are closer than people who just get on well with each other

[单项选择]It is important that the problems of water be solved, for as long as men live, water will continue to be what it is today -- next in importance to air.
A. 必须解决有关水的各种问题，这很重要，因为只要还有人活着，水就依然和现在一样重要—其重要程度仅决于空气。
B. 各类关于水的问题很重要，必须得到解决，原因是，只要人们活着，水就将继续保持和现在同等重要的地位—其重要性仅次于空气。
C. 重要的是水的问题已经得到了解决，为了人能活下去，水将继续发挥它现在的重要性—除了空气，就数它重要。
D. 解决水的问题是十分重要的，因为如果人要活下去，就要继续维护水现在的样子—它的重要性在空气的下面。

[单项选择]English is one of ______ important subjects in our school.

[单项选择]According to the passage water is important for all of the following, except______.
A. early international trade
B. the most common substance in living plant and animal tissues
C. hydroelectric power stations
D. sanitation and recreation

[单项选择]Running water has been a very important source of power for thousands of years．
A. 自来水是力量的重要来源，它已有几千年的历史了。
B. 流水作为动力的重要来源已有好几千年了。
C. 几千年来流水是动力的重要来源。
D. 运动的水作为动力的主要源泉已有几千年了。

[单项选择]I feel like drinking ______ now.

[单项选择]The contract is very important for our company, so let’s _____ the details carefully.
A. go after
B. go off
C. go through
D. go for

[单项选择]Water proof packaging costs our company 2 ( ).
A. million dollar
B. millions dollar
C. million dollars
D. millions of dollars