1. Choose the word or phrase (a,b,c or d) that best fits the blank space in the following passage.
Energy is very important in our modern life. People use energy(1)____ transportation, cooking, heating and cooling rooms, manufacturing, lighting, and entertainment.(2)____ energy nowadays comes from fossil fuels-petroleum, coal, and natural gas.(3)_____, burning fossil fuels causes pollution. Also, if we don't find new kinds of energy, we will(4)_____ all the fossil fuels in the near future. Scientists(5)_____to find other kinds of energy for the future. What might these(6)_____ of energy be?
1, a.in b.for c.at d.by
2, a.Most b.Mostly c.Almost d.Utmost
3, a.Because b.Moreover c.Therefore d.However
4, a.use up b.run out c.take over d.cut off
5, a.work b.are working c.worked d.will work
6, a.supplies b.needs c.sources d.products
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