1) tìm ước tự nhiên của 5100 2) tìm số tự nhiên n để phân số 3n+2 / 7n+1 rút gọn được

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1. “Open the door,” he said to them. - He told them................................................................... 2. “Where are you going?” he asked her. - He asked her where......................................................... 3. “Which way did they go?” he asked. - He asked... ...................................................................... 4. “Bring it back if it doesn’t fit”, I said to her. - I told... ............................................................................ 5. “Don’t try to open it now,” she said to us. - She told... ........................................................................ 6. “Is it going to be a fine day today?” I asked her. - I asked her... .................................................................... 7. “He’s not at home”, she said. - She said that... ................................................................. 8. “Is the bus station far away?” the girl asked. - The girl wanted to know... .............................................. 9. “Don’t stay out late, Ann” Tom said. - Tom told Ann... ............................................................... 10. “Please let me borrow your car,” he said to her. - He asked... ........................................................................ 11. “Jean, have you seen my gloves?” Thomas asked. - Thomas asked Jean..... 12. Don’t leave the window open, Mary”, I said. - I told Mary.... ................................................................... 13. “I’ll have a cup of tea with you,” she said. - She said that... 14. “I’ll pay him if I can” she said. - She said that... ................................................................... 15. “What are you going to do next summer?” she asked. - She asked us.... ................................................................... 16. “I’ll phone you tomorrow,” he told Jack. - He told Jack that.... ............................................................. 17. “Can I sit beside you, Jean?” Tom asked. - Tom asked Jean.... .............................................................. 18. “I want a camera for my birthday,” he said. - He said that.... ................................................................... 19. “Don’t keep the door locked,” he said to us. - He told us.... ................................................................... 20. “How long are you going to stay?” I asked him. - I asked him how long.... CÂU TƯỜNG THUẬT NHÉ