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zxyz = 21 x xy . tìm các chữ số x,y,z trên các chữ zxyz và xy có gạch trên như này" _____"
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XV. Choose the right answer. 1. I can’t go to a party. I haven’t got ____ to wear. a. anything b. everything c. something d. nothing 2. Take care ____, Ann. a. you b. your c. yours d. yourself 3. ____ would be lovely to see you again. a. It b. That c. There d. You 4. If you want some apples, I’ll get you ____ at the shop. a. any b. it c.one d. some 5. We’ve brought some food with ____. a. me b. we c. us d. ourselves 6. Who’s there? ~ Only ____. a. I b. me c. mine d. myself 7. Is ____ a post office near here? a. here b. it c. there d. this 8. Evervone has to leave ____ bags outside. a. his b. their c. its d.her 9. The two girl often wear ____ clothes. a. each other b. each other’s c. themselves d. themselves’ 10. Have you had enough to eat, or would you like ____ else? a. anything b. nothing c. something d. thing 11. Have you seen my calculator? I can’t find it ____. a. anywhere b. nowhere c. somewhere d. where 12. Peter has two brothers, but he doesn’t speak to ____ of them. a. any b. most c. either d. neither 13. Johnson spent ____ his life in the South. a. some b. most c. none of d. most of 14. We could all do more to keep healthy. We don’t look after ____ properly. a. ourself b. ourselves c. ours d. each other 15. The two boxers did their best to knock ____ out. a. them b. themselves c. each other d. each other’s

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