I. Each sentences has a mistake. Find it and correct it.
1. Everyone almost has been a volunteer at one time or another.
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2. People learn a lot for volunteer work.
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3. We decided to cleaning up the beach last week.
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4. He doesn't wear warm clothes enough in winter.
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5. Last year we provided evening classes with poor children.
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6. Sleep in at the weekends helps us recover from a busy week.
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7. My mother has a unusual hobby in life.
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8. Will you take in making pottery in the future ?
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9. Ha Long Bay is visit by thousands of tourists every day.
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10. We must know exactly how much people need eating.
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11. Try exercising if you want to keep fit.
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12. We need calories to doing things we do every day.
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