(1)
A)The threat of poisonous desert animals and plants.
B)The exhaustion of energy resources.
C)The destruction of oil wells.
D)The spread of the black powder from the fires. (2)
A)The underground oil resources have not been affected.
B)Most of the desert animals and plants have managed to survive.
C)The oil lakes soon dried up and stopped evaporating.
D)The underground water resources have not been polluted. (3)
A)To restore the normal production of the oil wells.
B)To estimate the losses caused by the fires.
C)To remove the oil left in the desert.
D)To use the oil left in the oil lakes.
原文：
Passage Three
When Iragi troops blew up hundreds of Kuwaiti oil well at the end of Gulf War, scientists feared environmental disaster. Would black powder in the smoke from the fires circles the globe and block out the sun?
Many said “No way?; rain would wash the black pwder from the atmosphere. But in America, airsampling balloons have detected high concentrations of particles similar to those collected in Kuwait. didn't catch fire. It has formed huge lakes in the Kuwaiti dersert. They trap insects and birds, and poison a veriety of other desert animals and plants.
The only good news is that the oil lakes have not affected the underground water resources. So far, the oil has not been absorbed because of the hard sand just below the surface.
Nothing, however, stops the oil from evaporating. The resulting poisonous gases are choking nearby residents.
Officials are trying to organize a quick cleanup, but they are not sure how to do it. One possibillity is to burn the oil. Get those black-powder detectors ready.
18. What were the scientists worried about soon after the Gulf War?
19. What was the good news for scientists?
20. What are the officials trying to do at the moment?