把正确的选项填入空白处，使短文意思完整。（5分）
In many countries, people produce power from coal, but it is very dirty and causes acid rain. Some countries use nuclear energy to produce power.1 . To solve the energy problem, people all over the world are looking for new ways to produce power.
China is one of the first countries in the world to use biogas technology. 2 . This renewable energy is used in people’s everyday life.
3 . Now there are electric vehicles in many countries. They are very efficient and cost very little to run. 4 , there will be an increase in electricity needs if they are widely used.
In China, the best—known maglev train is the German—built one in Shanghai. The train can reach a top speed of 431 km per hour.5 . There is no wheel noise, because there are no wheels. However, maglev guide paths are much more expensive than traditional steel railways.
A．Farmers recycle straw, grass and animal waste to make biogas.
B．Although electric vehicles produce no pollution.
C．However, nuclear power can be very dangerous.
D．It is quiet and quick.
E．Electric vehicles were developed in the 1990s.
C
网友回答
(答案→)C
解析：
【小题1】联系前文一些国家使用核能来发电，可知选C，然而，核电非常危险。
【小题2】联系上文对生物技术的描述可知选A，农民们回收秸秆，杂草和动物粪便来制造沼气。
【小题3】联系下文，现在许多国家有电动车。可知选E，在九十年代电动车发展起来。
【小题4】联系上下文对电动车的描述，可知前后是转折关系，故选B，虽然电动车不产生污染。
【小题5】联系上文每小时431千米的速度，及下文没有车轮噪音的描述可知选D，它非常快，并且静音。