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In the waning year of the nineteenth century,the Time Traveler is entertaining some friends after dinner with a discussion of time as the fourth dimension.All things,he says, exist not only in length,(51)______,and thickness,but i time as well.The only(52)______ we cannot properly perceive the dimension of time is that we ourselves are moving in it.
To correct this condition and to (53)______his theories,the Time Traveler has constructed a machine designed to help him move backwards or(54)______ through the centuries.He jolts his skeptical guests (a politician,a doctor,and a psychologist) when he shows them an actual model of the machine,which has taken him two years to construct.He persuades the psychologist to press a lever,and suddenly the(55)______ disappears.The Time Traveler tells his astonished guests that as soon as his machine is perfected he hopes to launch himself into the future.
The next week the same group gathers at the Time Traveler's house,joined by a newspaper editor.Their (56)______ is late for dinner,and his guests wonder what is keeping him.Can he(57)______ have traveled into the future?
Suddenly the door bursts open and the Time Traveler(58)______,dirty, disheveled, and bedraggled,with a nasty cut on his chin.After he has cleaned up and dressed and they have all dined,he tells the guests his extraordinary story.
In the week after demonstrating his model, the Time Traveler perfected his machine. That very morning, strapping himself into the time machine, he took off like a(59)______ into the future. The travel was very (60)______,for the days and nights sped past in such rapid succession that his eyes hurt from the alternating light and dark. Eventually, in the misty, strange world of the future, he brought his machine to a jolting halt and found himself in the year AD 802 701.
（From The Time Machine）