giúp mình nhé : 25. It is compulsory. You………………wear a helmet. A. should B. need C. may D. must 26. My father is fond of sports. He goes to the Sports Club to watch _____________every Saturday. A. racing horses B. race horse C. horse races D. horsing race 27. You ___________be home before dark because it is dangerous to walk home alone at night. A. might B. may C. ought D. must 28. We should use reusable water bottle ____________of plastic one. A. because B. instead C. despite D. however 29. The bear _________you if you ______________it. A.attacks/ provoke B. will attack/ provoke C. attacks/ will provoke D. will attack/ will provoke 30. I first_______________ Ho Chi Minh City in 2013. A. go B. went C. visited D. been to 31. If the ______________ is polluted, we won’t have enough food to eat. A. water B. air C. noise D. soil 32. We should give unused clothes to_____________to help the people in need. A. charity B. factory C. market D. hospital 33. My head hurts. I need to take a ………. A. sun cream B. backpack C. walking boots D. painkiller 34. She is always… at school. She spends most of the time studying A. hard-working B. careful C. lazy D. funny