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Passage Three All the useful energy at the surface of the earth comes from the activity of the su...

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read    to read    reading    having read  
who  that  when  whose  
was constructed in the nineteenth century.  will be finished in three years' time.  follows some of the original lines.  took three years longer than expected to complete.  
three    third    the third    the three  
celebrate the three main events in life, but in different ways  are not affected by these three events  celebrate these three events in exactly the same way  are the same  
affected  have affected  are affecting  affect  
of the celebrations  they are important  there are special ceremonies  societies share common characteristics  
Each has three separate but identical armature windings acted on by one system ofrotating magnets  Each has one armature winding acted on by three identical but separate systems ofrotating magnets  All three-phase alternators are designed to operate with a O8 leading power factor  The three phases always provide power to the load through three sets of slip ringsand brushes  
varies from month to month  remains tile same all the year round  varies with the seasons  changes without stopping  
three hours   three-hours   three hour’s   three hours’  
Wales is the richest of the three.  Scotland is the largest of the three.  Sometimes England is used instead of Britain.  Britain is the only name of the largest island of British Isles.  

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