吉尔布雷斯夫妇进行了著名的“搬运生铁块试验”和“铁锹试验”改进了操作方法，提高了劳动生产率。()
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To reduce the pollution, some industries are now______.
A. treating the waste water containing harmful chemicals
B. leading water to a more prosperous marketplace
C. increasing water supplies
D. asking economic use of wastes
The man went to work in South America because______.
A. his English was good enough to find a job there
B. he was interested in people"s life there
C. he wanted to teach Spanish there
D. his family moved there
What is the most important factor in dealing with a life-threatening situation？
A. Power.
B. Skills.
C. Patience.
D. Weapons.
The trick of sale e-mail takes advantage of peoples psychology that______.
A. if I buy the goods, I will save more money
B. if I don"t buy the goods, there will be no such goods
C. if I buy the goods, I will get a free gift
D. if I don"t buy the goods, they will raise the price
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