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Tìm X thuộc Z, để giá trị biểu thức B= 3x + 4/ x - 3 thuộc Z
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PRACTICE EXERCISES 1. He’s not sure _______ the idea at the moment, but I’m sure we’ll win him over in the end. A. from B. about C. through D. over 2. She doesn’t need _______ a dress for the wedding party. A. to choose B. choose C. choosing D. chose 3. These facts may be familiar _______ you. A. with B. about C. into D. to 4. They reminded me _______ late. A. to not come B. not coming C. not to come D. to come not 5. The train is _______ arrive at Glasgow Central at 12:12. A. due to B. due about C. due through D. due from 6. We sought to integrate Amy _______ the everyday affairs of the company. A. inside B. above C. into D. from 7. Tet is also the time for children to receive _______ money wrapped in red envelopes. A. timely B. lucky C. propitious D. blessed 8. The plenitude of our natural resources has resulted in most people _______ them for granted for most of human history. A. making B. looking C. showing D. taking 9. Katie chose _______ away from work that day. A. stayed B. to stay C. staying D. being stay 10. Imagine that a housing team is doing a research _______ students. A. on B. into C. over D. of 11. They define themselves _______ nationality, ethnicity, location, history, language and gender. A. in B. about C. by D. above 12. We all _______ a family and it is our family that keeps us together through thick and thin. A. belong to B. belong of C. belong about D. belong on 13. They feel _______ with the salesperson’s services. A. satisfying B. satisfactory C. satisfaction D. satisfied 14. They _______ the final stage called cultural identity achievement. A. keep B. look C. help D. reach 15. About 800,000 children are exposed _______ poisons each year. A. to B. by C. as D. off 16. Although my best friend now lives in Da Nang, we still try to keep in touch _______ each other. A. for B. with C. on D. up to 17. Some people _______ a strong urge to keep their cultural identity, so they continue speaking their language. A. taste B. feel C. touch D. think 18. My boss’s absence enabled me _______ myself as a key figure in our department. A. to establish B. established C. establishing D. establishes 19. Mexico _______ its independence from Spain in 1821. A. collected B. expanded C. increased D. gained 20. You _______ a tendency to exasperate me with your stubbornness. A. do B. make C. have D. get 21. _______ conclusion, I would like to thank our guest speaker. A. Over B. In C. Upon D. Onto 22. We’re particularly proud _______ our company’s environmental record. A. of B. off C. through D. by 23. The children soon settled _______ and started their work. A. up B. down C. at D. along 24. Taking part in different activities of the festival, group members get together, have fun, and _______ their cultural image. A. promote B. help C. loose D. show 25. Neil Armstrong is famous _______ being the first man to walk on the Moon. A. from B. round C. for D. about 26. They _______ their lives for their country. A. sacrificed B. gave C. lost D. let 27. Let us pray _______ the victims of this terrible disaster. A. from B. over C. through D. for

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