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toan4869
2 năm trước
Tìm m để hệ phương trình có nghiệm (x,y) thỏa mãn x ² + y ² =5 3x-y =2m -1 x+2y= 3m +2
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Part 1: Rewrite each sentence beginning as shown, so that the meaning remains the same. Example: He wrote the letter in two hours. It took him two hours to write the letter. 1. The keepers feed the lions at 3 pm every day. The lions ................................................................................................................................. 2. We got lost because we didn't have a map. If we ........................................................................................................................................ 3. I would prefer you to deliver the sofa on Friday. I would rather ......................................................................................................................... 4. The bridge was so low that the bus couldn't go under it. It was ...................................................................................................................................... 5. That was a silly thing to say. What ....................................................................................................................................... 6. We've run out of tea. There........................................................................................................................................ 7. I last saw him when I was a student. I haven't .................................................................................................................................. 8. Susan was too excited to sleep. Susan was ............................................................................................................................... 9. Robert has not had a job for two years. Robert has been ..................................................................................................................... 10. She will complete the work only she is paid extra. She will not ...................................................................................................................................................... Part 2 Use the words in the brackets to combine the following sentences. 1. All the students love the principal. He is very kind. (because of) ...................................................................................................................................................................................................... 2. I have forgotten the tickets. I’m sorry for it. (having) ...................................................................................................................................................................................................... 3. I saw it with my own eyes. I believed it. (if) ...................................................................................................................................................................................................... 4. The house at the end of the street has been sold. It has been empty for years. (which) ...................................................................................................................................................................................................... 5. It's a pity he doesn't take the doctor's advice. (wish) ......................................................................................................................................................................................................

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