Passive structures

Gap-fill exercise

Fill in all the gaps , then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. Note that you will lose points if you ask for hints or clues!
Make the sentences passive. Use by... only if it is necessary to say who does / did the action.

1. My mother made this ring.
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2. Electricity drives this car.
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3. Somebody will tell you where to go.
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4. A drunken motorist knocked her down.
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5. The Chinese invented paper.
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