12.Look at the four squares [█] that indicate where the followingsentence could be added to the passage.

　　The factories did not have to goto the streams when power could come to the factories.

　　Where would thesentence best fit?

　　13.The Industrial Revolution wouldnot have been possible without a new source of power that was efficient, movable，and continuously available.

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　　Answer Choices

　　1.In the early eighteenthcentury, Savery and Newcomen discovered that expanding steam could be used toraise a piston in a cylinder.

　　2.Watt’s steam engine played a leading role in greatly increasingindustrial production of all kinds.

　　3.Until the 1830s，Britain was the world’smajor producer of steam engines.

　　4.In the mid-1700s James Watt transformed an inefficientsteam pump into a fast，flexible，fuel-efficient engine.

　　5.In the 1 790s William Murdoch developed a newway of lighting houses and streets using coal gas.

　　6.The availability of steam engines was a major factor in the developmentof railroads，which solved a majortransportation problem .

　　参考答案：

　　1.○ 4

　　2.○2

　　3.○1

　　4.○ 3

　　5.○ 2

　　6.○ 1

　　7.○ 1.

　　8.○3

　　9.○ 4

　　10.○3

　　11.○ 2

　　12.○3

　　13.○2

　　4 6