4.Correct the mistaken prepositions in the following sentences. (Sửa các giới từ bị dùng sai trong các câu sau đây.)
1. I like the red scarf at the shelf over there.
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2. Nam left his watch in the sofa.
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3. The music festival ends on 10 p.m.
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4. She lives on a small flat over there.
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5. He always get up late in Monday morning.
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6. My birthday is at two weeks.
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7. This house was built on the 19th century.
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8. We usually give gifts each other on Christmas.
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9. There are lots of interesting activities in New Year's Day.
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10.We might live on the Moon at fifty years.
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