[单项选择]Scientists and doctors believed that Lorenzo's Oil ________.

[单项选择]Doctors said that Lorenzo might die within three years because ________.
A. they had never treated the disease before
B. Lorenzo was too young to be, cured
C. no cure had been found for ALD
D. ALD was a rare disease

[单项选择]Lorenzo's father organized an international study to ________.

[单项选择]It is believed by scientists that traditional medicines

[单项选择]The world's oil supply
A. haven been gradually being exhausted
B. is being gradually exhausted
C. is gradually exhausted
D. has gradually exhausted

[单项选择]What is the author's attitude towards doctors
A. sarcastic
B. praising
C. objective
D. appreciative

[单项选择]According to doctors, Mr. Hajjarian's condition is _______.


A. serious
B. critical
C. improving
D. unknown

[单项选择]What is the author's opinion on doctors' right to help people end their lives
A. It is legalized murder.
B. It is out in the open.
C. It is appropriate and enlightened.
D. Not given.

[单项选择]During the 1990s world oil production will approach geological estimates of maximum production______, even with rapidly increasing petroleum prices.
A. capability
B. quota
C. potentiality
D. capacity

[单项选择]The woman’s illness _____ the doctors; they couldn’t find the cause.
A. attracted
B. excited
C. puzzled
D. interrupted

[单项选择] Scientists predict that the world’s known oil resources will _____ early in the next century.
A. run off
B. run out
C. run up
D. run over

[单项选择]What is the author's forecast about the future oil price or economy
A. The economy will stay unaffected by the high oil price.
B. The economy will be hit if the oil price keeps high.
C. The oil price will surely drop by the end of the year.
D. The oil price will keep on rising in the rest of the year.

[单项选择]Oil companies in the U.S. are already beginning to feel the pressure. Refinery workers and petroleum-equipment-manufacturing employees are being ______.
A. laid out
B. laid off
C. laid down
D. laid aside

[单项选择]

Cars account for half the oil consumed in the U. S. , about haft the urban pollution and one fourth the greenhouse (温室) gases. They take a similar toll (损耗) of resources in other industrial nations and in the cities of the developing world . As vehicle use continues to increase in the coming decade, the U.S. and other countries will have to deal with these issues or else face unacceptable economic, health-related and political costs. It is unlikely that oil prices will remain at their current low level or that other nations will accept a large and growing U. S. contribution to global climatic change.
Policymakers and industry have four options: reduce vehicle use, increase the efficiency and reduce the emissions of conventional gasoline-powered vehicles, switch to less harmful fuels, or find less polluting driving systems. The last of these -- in particular the introduction of vehicles powered by electricity -- is ultimately the only sustainable option. The other alternat
A. consume half of the oil produced in the world
B. have serious consequences for the well-being of all nations
C. widen the gap between the developed and developing countries
D. impose an intolerable economic burden on residents of large cities