[填空题]The drinking water was polluted by the toxins that had seeped into soils and groundwater.

[填空题]The drinking water was polluted by the toxins that had seeped into soils and groundwater.

[单项选择]In 1969, an oil leak polluted the water and（　）the beaches of the southern California coast.
A. spoiled
B. ruined
C. decayed
D. hurt

[简答题]Nowadays drinking pure water has become a fashion with many people. Please write all essay commenting on:
1) the reason for its popularity
2) the effects it may have on people’s health
Your essay should be about 120 words.

[填空题]Drinking dirty water has become a major cause of death among children in developing countries.

[单项选择]Drinking a lot of water and taking plenty of sleep are often regarded as（）for a cold.
A. operations
B. corrections
C. remedies
D. means

[单项选择]
Not a plant to be seen，the desert ground is too dry．But the air contains water，and research scientists have found a (51) of obtaining drinking water from air humidity．
“The process we have developed is based exclusively on renewable energy sources (52) thermal solar collectors and photovoltaic(光电的)cells， (53) makes this method completely energy autonomous．It will (54) function in regions where there is no electrical infrastructure(基础设施)，”says Siegfried Egner，head of the research team．The principle of the (55) is as follows：hygroscopic(吸湿的)brine(盐水)，-saline(含盐的)solution which absorbs moisture-runs down a tower shaped unit and absorbs water from the air．It is then sucked (56) a tank a few meters off the ground in which a vacuum prevails．Energy from solar collectors (57) up the brine，which is diluted by the water it has (58) ．
Beca
A. in spite of
B. because of
C. as a result of
D. such as