1. I have written this letter for two hours
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2. They have lived at 23 To Hieu street since 2000
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3. My uncle began to teach English five years ago.
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4. My friend has been working at the grocery store since 2005.
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5. We have studied Math since seven o'clock.
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6. His sister has played the piano since she was very young.
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7. We have been waiting this news for a long time ago.
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8. The Pikes began to live here on July 1st, 1999
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9. It began to rain when I got up this morning
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10. Snow has dropped in this area since the beginning of this month
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_Hết_