is already well understood，the report notes．The west Germans and the Japanese already well
understood，the report notes．The west Germans and the Japanese have several full－scale
working models．Meanwhile,research in the United States has lapsed．
11．What is the best title for this passage？
A．The Future of Transportation
B．Argonne Develops Maglev Train
C．T’he Disadvantages of Commuting by airplane
D．Commuting in the Future
12。According to the passage，when could people start using a maglev commercially？
A．In 5 years． B．In 10 years．
C．In 20 years． D．In more than 20 vears·
13．Why could maglev train replace shoft－fight commuter aircraft？
A．Maglev trains are faster．
B．Maglev trains are cheaper．
C
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