12.. ……….will Minh be on his next birthday? - He will be fourteen. * A. How much B. How old C.How long D. How often 13. My sister always ……… her teeth after dinner. * A.. brush B. brushes C. brushing D. to brush 14.The food in that restaurant is very………………. * A. easy B. difficult C. delicious D. noisy 15.Myan has lived in Canada with her grandparents _________ 2010. A. in B. for C. at D. since 16. He ......................this bicycle for two months. * A. buy B. bought C. has bought D. have bought 17. Many students ……….. aerobics to keep fit. * A. have B. go C. play D. do 18. We will have a …………….. to take care of our health. * A. home robot B. doctor robot C. teaching robot D. worker robot 19. I’m very thirsty, but there isn’t……….water in the bottle. * A.some B. a C. any D. an 20. Hoa lives………her uncle and aunt ………. Ha Noi. * A. with/ on B. with/in C.in/ in D. at/ on 21.This little girl …….. read when she was five years old. * A.can B. could C. will D. will be able to