Question

Complete the text using two of the expressions.
Thomas Alva Edison was a famous American inventor. He was the creator of the light bulb, the phonograph and the kinetoscope (the first video camera). ____________(a) for him.
At the beginning, the creation of the light bulb was difficult. People say that about 1000 experiments were necessary to make it work. It was apparently _______________ (b). But in the end Edison was very persistent. Finally, his invention was successful.
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Answer 1

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Answer 2

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