A. THE LIGHT BULB WAS INVENTED BY EDISON, HE DISCOVERED OTHER NEW...

80. a. The light bulb was invented by Edison, he discovered other new things.

b. After the light bulb was invented, Edison discovered other new things.

c. Having invented the light bulb, Edison went on to make new discoveries.

d. Having inventing the light bulb, new discoveries were made by Edison.

(81-85). Rewrite the sentences so that they are nearest in meaning to the sentence

printed before them.