Ko giải thích 11.Drinking enough water is a vital part it keeps your body functioning properly. A. because B. or C. but D. although 12.Her new boss is so bad that he does never take of her extra hours of work, that’s why she need to change her job now. A. into investigation B. into account C. consideration D. account 13.If I could speak Spanish, I next year studying in Mexico. A. would have spent B. would spend C. will spend D. had spent 14.Your doctor, advice you ought to listen to, is a clever man indeed. A. whose B. which C. who D. whom 15. Interesting movements have been launched to attract the of a large number of youths. A. participant B. participating C. participate D. participat