There is a mistake in each of these sentences. Underline the mistake and then correct it. (2pts)
3. He gave up to smoke 2 years ago.
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4. He is a fast runner. He runs fastly.
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5. Can I lend your pencil? I'm sorry. I'm using it.
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6. You should keep silently when they are working.
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7. How many times in a day do you brush your teeth ?
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8. Long is worried because he has see the dentist.
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