8. Minh loves playing chess _____________ his sister enjoys skipping in their free time. A. when B. because C. while D. during 9. One hundred dollars ______________ an big amount of money for her. A. is B. are C. were D. is being 10. Don’t overheat the victim _____________ blankets or coats. A. on B. for C. with D. from 12. They as well as Mai ___________________ in the field at this time last Sunday. A. was working B. were working C. has worked D. have worked 13. Thanks _______ Alexander Graham Bell’s invention, I can communicate with each other easily. A. for B. from C. on D.to 14. We must _________ the environment from the pollution every day. A. save B. protest C. protect D. waste 15. In our opinion, there are a lot of differences _________ two twins. A. from B. without C. with D. between 17. Have a picnic with ______________ in the mountain tomorrow. A. Hanh and I B. Hanh and me C. I and Hanh D. me and Hanh 18. Study is no _____________ restricted to just one location. A. longer B. long C. longest D. the longest 19. My son was hit _______________ a stick while he was working in the field. A. by B. with C. without D. out 20. Nam and Manh have played badminton for two hours, but __________ of them are tired. A. none B. both C. neither D. all

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