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1 What is the main topic of the passage?

Edison’s electric light company
Edison and his helpers
✔ Edison’s great invention
Edison’s various inventions

2 Why was the tungsten filament lamp better?

✔ It lasted longer. It was brighter
It was cheaper It was prettier.

3 Which is NOT true according the passage?

✔ A tungsten filament was first used by Edison.
Edison invented the light bulb after opening his company.
People wanted to have the bulbs lasted longer.
Edison experimented over a thousand times to make the bulb.

4 What can be inferred from the passage?

Many things have changed thanks to the light bulb.
Edison always did everything by himself.
Edison’s company did not last very long.
✔ Today’s light bulb is different from Edison’s.

Visualize the Text

Complete the map with the words from the passage.

The First Light Bulb

Edison did a He had many At last, he People wanted A different
lot of . made the to have
was developed,
to make But he never . and the new
something gave up. bulbs. bulbs worked
new.
.

Unit 1 Invention 129