Rewrite the sentence into reported speech:
1. The teacher siad to us,"Don't look at your friends' paper test"
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2. My mother said, "You should wear warm clothes when going out"\
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3."You look tired, you should go to see the doctor", Lan said.
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4. "Come in, please", the saleman said.
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5."Don't touch in anything there", the old man said.
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6. My grandmother told me,"Can you send me this letter?"