One day, Alexander Graham Bell was doing an (1) ______experiment_____in his workshop. He was (2) ______careless_____ and spilt some burning liquid onto his clothes. Talking into his telephone, Bell said, “Mr. Watson, I want you to come (3) ______over_____ here immediately, please.” His assistant, Watson was in another room (4) ______far_____ away from the workshop; however he heard Bell (5) ______clearly_____ on his own telephone. Quickly, he ran to Bell’s workshop. “Mr. Bell I heard every sound you said”, Watson shouted (6) ______excitedly_____. Bell has finally (7) ______succeeded_____. He has invented the first telephone. Later other (8) ______inventors_____ made better one.
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