把下列直接引语变为间接引语或把间接引语变为直接引语。
1. The teacher told Tom to be careful with his pronunciation.
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2. He asked us, "Where are you going next week?"
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3. The teacher said, "We worked here 20 years ago."
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4. My uncle said, "I sowed my carrot seed yesterday."
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5. He said that he would go there that night.
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6. His mother said to him, "Don't be late for school."
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