Mọi người giúp em với ạ Em đang cần rất gấp. 16. The _________ of quan ho singing has been recognized as a world heritage. A. preservation B. procession C. song D. performance 17.After a hard-working day, you may sleep _________ than usual. A. sound B. soundly C. soundlier D. more soundly 18.On the side of the road, a herd boy was herding _________. A. kites. B. hay. C. cattle D. blackberries. 19.He _________ put a stamp on this letter. It says FREEPOST on it. A. mustn’t. B. don’t have to. C. can’t D. shouldn’t 20. Ghe Ngo Race is a religious ritual of the Khmer to _________ the Snake God Nagar. A. commemorate B. preserve C. command D. process 21. while I _________ along the road, I saw a friend of mine. A. cycled. B. was cycling C. had cycled D. were cycling 22. The elder brother was _________ when he gave his brother only a starfruit tree. A. lazy. B. mean. C. generous. D. clever 23. The communal house is used _________ village meetings and festivities. A. of. B. forC. toD. in 24.Carpentry isn’t right _________ my street. I’d rather pay someone else to do it. A.  in from. B. up C. to. D. at  25.A lot of kids nowadays have become addicted _________ surfing the net. A. at. B. from. C. to. D. on