As the name implies solar is the energy from the sun's rays . The amount of energy that the earth receives from the sun is many times ( 31 ) the amount used by man . If a ( _ 32 ) way to use it fullly could be developed ，( 33 ) source would be needed . It is however used efficiently by plants that ( 34 ) the food on which animals directly or indirectly depend . Solar energy is ( _ 35 ) underground in the form of fossil fuels such as coal and petroleum . In the ( 36 ) an important source of energy was ( 37 ) in the form of wood . The Industrial Revolution needed the use of coal . Recently the fossil fuels have become the chief energy source ( _ 38 ) nuclear power developing very rapidly . The fossil fuels are our present main source of energy . Petroleum will support us for about 15 years . Natural gas which is ( _ 39 _ ) of the fossil fuels will probably be the first to be ( _ 40 _ )31 A as many B as much C as more D greater than 32 A actual B practical C real D true33 A no B practical C no other D none of other 34 A suggest B supply C imply D provide 35 A stored B suggested C implied D provided 36 A past B present day C future D long run 37 A stored B saved C changed D provided38 A as B with C while D ) though39 A cleaner B more clean C the cleanest D the most clean 40 A run out B run up C . used out D used up

Solar energy is man' s most important energy source . As the name implies solar is the energy from the sun's rays . The amount of energy that the earth receives from the sun is many times ( 31 ) the amount used by man . If a ( _ 32 ) way to use it fullly could be developed ，( 33 ) source would be needed . It is however used efficiently by plants that ( 34 ) the food on which animals directly or indirectly depend . Solar energy is ( _ 35 ) underground in the form of fossil fuels such as coal and petroleum . In the ( 36 ) an important source of energy was ( 37 ) in the form of wood . The Industrial Revolution needed the use of coal . Recently the fossil fuels have become the chief energy source ( _ 38 ) nuclear power developing very rapidly . The fossil fuels are our present main source of energy . Petroleum will support us for about 15 years . Natural gas which is ( _ 39 _ ) of the fossil fuels will probably be the first to be ( _ 40 _ )

31 A as many B as much C as more D greater than 

32 A actual B practical C  real D true

33 A no B practical C no other D  none of other 

34 A  suggest B supply C  imply D provide 

35 A stored B suggested C implied D provided 

36 A past B present day C future D  long run 

37 A stored B saved C changed D provided

38 A as B with C  while D ) though

39 A cleaner B more clean C the cleanest D the      most clean 

40 A run out B run up C . used out D used up