Giúp mình với. Chỉ cần đáp án thôi nhé 11. Those children always help their parents ……… the housework. A. to B. with C. do D. B& C are correct 12. My sister works …………. than me. A. less hour B. few hours C. more hours D. little hours 13. Let’s go to the movies this evening. - Yes, …………….. A. That’s a good idea B. we are C. Thanks D. Iam 14. There is an intersection ahead. We ……………. A. must not slow down B. must go fast C. can not go straight D. must slow down 15. There is a ……… behind my classroom. A. big flower garden B. flower big garden C. garden big flower D. big garden flower 16. The road signs are very ……….. They tell us what we must do. A. useful B. dangerous C. easy D. difficult 17. My son is really afraid ………… dogs. A. for B. of C. with D. at 18. My brother likes watching TV ……… I like going out with my friends. A. and B. so C. or D. but 19. The Mekong River …………….into the Bien Dong. A. runs B. goes C. flows D. comes 20. Nobody ___________ him very well because he is new here. A. know B. knows C. knowing D. knew