Change the following sentences into NEGATIVE sentences and INTERROGATIVE sentences.
1. He received a letter from his penpal last week.
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(?) ......................................................................................................................................................................
2. She taught us English last year.
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(?)....................................................................................................................................................................
3. They did their homework carefully.
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(?) .....................................................................................................................................................................
4. The Robinsons bought a lot of souvenirs.
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(?) ......................................................................................................................................................................
5. Tourist ate seafood at that famous restaurant.
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(?) ......................................................................................................................................................................
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